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Frequently Used Custom Metal Fastener Styles

PRIME builds precision fasteners to the highest standards of strength, reliability, and customization

Precision Customsized Fasteners

Screws

Applications: Passenger Vehicles, Commercial Trucks, Off-Road

Industry intro: The automotive industry requires fasteners that ensure secure connections, resist vibration loosening conditions.

Threaded Rods

Applications: Steel Frame Buildings, Bridges, Tunnel Supports

Industry intro: The construction sector relies on threaded rods for high-strength connections in large-scale structural projects.

Nuts

Applications: Aircraft Assemblies, Engine Components

Industry intro: The aerospace industry demands lightweight, high-strength nuts with consistent performance in extreme temperature.

Washer

Applications: Steel Bridges, High-Rise Buildings, Wind Turbine Towers

Industry intro: Construction projects require washers that can withstand high clamping forces, resist weathering.

Slotted set screws

Applications: Gearboxes, Conveyor Systems, Robotics, Power Tools

Industry Intro: In automation and mechanical drive systems, slotted set screws lock gears, pulleys

High-strength hex flange

Applications: Wind Turbine Towers, Offshore Platforms,

Industry intro: Renewable energy projects rely on High-strength hex flange fasteners for long-term stability.

Why PRIME Delivers Superior Custom Fasteners

Your choice of fastener partner directly impacts your product’s safety, manufacturing speed, and market reputation. PRIME offers unparalleled fastening solutions built on decades of engineering experience, ISO-certified precision, and seamless global logistics. For both standard components and innovative custom designs, we provide end-to-end expertise that ensures your project’s success.

We ship fasteners worldwide to North America, Europe, the Middle East, and Australia, providing all necessary export paperwork and adaptable delivery options.
We maintain ISO 9001:2015 certification through rigorous batch-by-batch verification of mechanical strength, dimensional accuracy, and surface treatment quality.
We provide fasteners in materials like carbon steel, stainless steel, and brass, manufactured to meet DIN, ANSI, ISO, or your own custom specifications.

"Need a Fastener That Actually Meets Your Specs?"

Submit your drawings, specs, or samples for a fast response. Our engineers will provide material recommendations, technical analysis, and a competitive quote within one business day. Partner with PRIME to get the quality, durability, and reliable service your supply chain requires.

Customized metal fasteners are essential core components in modern industrial systems, widely applied in critical sectors such as construction, automotive, energy, and machinery manufacturing. At Prime, we provide tailored fastening solutions using high-precision metalworking

Custom-Engineered Fasteners of Metal for High-Stakes Applications

Customized metal fasteners are widely used in hydraulic and pneumatic systems, automation equipment, construction machinery, petrochemical facilities, rail transit, marine equipment, and other critical fields. As core components of various high-pressure driving and load-bearing systems, they play a vital role in ensuring secure and stable connections. With exceptional tensile strength, corrosion resistance, and fatigue performance, these fasteners are engineered to withstand high loads, frequent vibration, and harsh environments—ensuring long-term equipment reliability and operational safety.

At Prime, we offer one-stop customized solutions, from drawing design to mass production and global delivery, meeting the strictest performance and specification requirements for high-performance fasteners worldwide.

What Every Buyer Should Ask About Custom Fasteners

Get the clarity you need to source confidently. Our FAQ covers essential topics—from material specs and coatings to tight tolerances, shipping, and compliance—so you know exactly what to expect.

Which materials does PRIME work with for custom fasteners?

Our material portfolio includes carbon steel, stainless steel (grades 304, 316, and 410), alloy steel, brass, aluminum, and titanium. We also provide DFARS-compliant and RoHS-certified materials to meet specialized regulatory requirements

Which surface treatments do you offer for fasteners?

Our surface treatment capabilities include zinc plating, hot-dip galvanizing, black oxide, nickel/chrome plating, anodizing, and phosphate coating. We also develop custom anti-corrosion finishes tailored to your specific environmental and performance requirements.

To which thread class standards can you manufacture?

We manufacture threads to international standards (ISO, DIN, ANSI). For high-precision applications, we achieve tolerances within ±0.01mm using CNC thread rolling or machining processes.

Can you produce fasteners based on my drawing or sample?

We specialize in custom manufacturing from your CAD models, drawings, or samples. Our services include OEM and ODM solutions, supported by rapid prototyping and scalable mass production.

How are fasteners packaged and shipped internationally?

To ensure safe transit and compliance, all products receive anti-rust treatment, are individually packed in polybags or boxes, then secured in export-ready cartons on fumigation-free pallets. We provide flexible trade terms (CIF, FOB, DDP) and complete documentation, including Certificate of Origin, Form A/E, and HS codes.

Do you offer compliance testing and third-party inspection?

Absolutely. We welcome third-party quality verification (SGS, TUV, BV) and provide essential documentation like PPAP, RoHS/REACH certificates, and material test reports to ensure compliance and streamline your sourcing process.。

First：How would you define a custom metal fastener?

For critical connections that standard fasteners can’t handle, custom metal fasteners provide the solution. They are engineered to your precise specifications, delivering unmatched strength, lasting durability, and reliable performance in even the toughest environments.

In every industry, the reliability of an assembly depends on its fasteners. PRIME designs custom fasteners to perform with exact precision and unwavering durability, even when faced with extreme stress, heat, or motion, ensuring your product’s safety and longevity.

Essential Qualities of Custom Fasteners

Robust construction

Built for tough conditions, our bolts and screws are incredibly strong against pulling and twisting forces. We make them this reliable by carefully choosing the metal and treating it with heat.

Available in numerous materials

We provide fasteners in a wide range of materials—including carbon steel, alloy steel, stainless steel, aluminum, brass, and titanium—to meet specific requirements for strength, corrosion resistance, and electrical conductivity.

Adaptable solutions

For critical high-performance applications, we create custom fasteners tailored to your exact specifications. This includes designing unique forms, threads, drive types, and protective coatings, as well as adding custom labeling on any bolt, screw, nut, washer

Production-proven design

We guarantee high-volume production of reliable OEM fasteners with exacting standards, thanks to our fully automated production and integrated inspection systems

Popular Fastener Production Methods

Cold Heading: A high-speed forming method for creating fastener heads and shapes without material waste or heating.
Thread Rolling: Displacement-based process that forms precise threads with stronger fatigue resistance than cut threads.
CNC Machining: Used for complex fastener geometries and precision-critical parts with custom requirements.
Heat Treatment: Enhances strength, hardness, and performance through controlled tempering and quenching processes.
Surface Finishing: Options include zinc plating, black oxide, anodizing, passivation, and coatings for corrosion and wear protection.
Inspection & Sorting: 100% dimensional and visual checks using optical sorting, thread gauges, and hardness testing.

Industries That Rely on Custom Fasteners

Automotive

Fasteners for engine components, suspension systems, interior trims, and electronic assemblies built for high-speed environments.

Electronics

Precision fasteners used in airframes, turbines, and cockpit assemblies with exacting strength-to-weight standards.

Aerospace

Miniature fasteners for circuit boards, enclosures, and heat sinks — tailored for conductivity and compact form factors.

Machinery & Equipment

High-load bolts, nuts, and washers for machines, conveyors, and power systems where reliability is critical.

Marine & Construction

Corrosion-resistant fasteners for offshore platforms, bridges, ships, and infrastructure exposed to harsh environments.

Second: Discover How Custom Fasteners Are Produced and PRIME’s Specialized Skills

Comprehensive for Guidance

Struggling with fastener performance or supply chain instability? PRIME engineers custom solutions to solve these exact problems. Explore our manufacturing capabilities and product range to see how we guarantee critical benefits like corrosion resistance, high-tensile strength, perfect fit, and volume production you can count on.

Fasteners: The engineered art of connection and strength.

A secure assembly relies on fasteners that perform predictably under pressure. PRIME delivers that reliability by engineering custom fasteners—including bolts, nuts, screws, and rivets—to your exact specifications for mechanical stress, corrosion resistance, and material, guaranteeing a perfect connection.

Custom Engineered Fasteners for Your Needs

Your fastening challenges are unique. That’s why we start by thoroughly evaluating your part design, performance loads, and how you assemble to engineer the perfect custom fastener and specify the ideal production process. Discover how we do it below.

1. Cold Heading: Precision forming at high speed

Cold heading forms the fastener head and body at room temperature using high-pressure dies. This process is ideal for bolts, screws, rivets, and pins — offering excellent material utilization, work hardening, and strength without cutting. PRIME’s multi-die header machines operate at up to 200 strokes/min, delivering fasteners with superior grain flow and dimensional consistency.

2. Thread Rolling: Durable threads without cutting

Unlike cutting, which weakens the metal, our thread rolling process actually strengthens it. This is why leading industries rely on rolled threads for essential fasteners like screws and bolts. PRIME leverages state-of-the-art flat and planetary die systems to guarantee that every thread delivers optimal load distribution and strict adherence to ISO, UNC, and DIN specifications.

3. CNC Machining: Complex geometries with high precision

CNC machining is used for specialized fasteners requiring tight tolerances, complex geometries, or limited production volumes. It enables precision drilling, milling, slotting, and countersinking on various materials. Our CNC department supports prototyping, toolmaking, and production of non-standard fasteners for critical aerospace, medical, and industrial assemblies.

4. Surface Finishing: Protection and performance

Surface treatment enhances corrosion resistance, aesthetic finish, and mechanical performance of fasteners. We offer zinc plating, nickel, black oxide, Dacromet, anodizing, and more — with RoHS/REACH compliance. PRIME’s automated surface lines ensure uniform coating thickness and adhesion while maintaining full traceability and batch control.

Key Considerations Before You Buy

For optimal pricing and faster delivery, partner with us early. By providing detailed drawings, volume estimates, coating needs, and tolerances, you enable our team to craft the most efficient manufacturing and quality plan, ensuring your project succeeds on every metric.

Third: Material Selection Guide — Ensuring Strength in Custom Fasteners

Material selection is a critical factor in the strength, corrosion resistance, and functional reliability of custom metal fasteners. At PRIME, we offer in-depth knowledge of industrial material grades and help our clients choose the best match for their load-bearing, environmental, and assembly requirements. Whether you need high-tensile bolts, corrosion-resistant screws

How PRIME Supports Fastener Material Selection

Don’t let material choice compromise your design. PRIME’s expertise ensures your custom fasteners—from high-tensile bolts to corrosion-resistant screws—are built with the optimal material for unparalleled strength, durability, and reliability. We partner with you to perfectly balance performance, production feasibility, and budget.

Certified Raw Materials & Full Traceability

Every batch of fasteners is traceable with supporting MTCs (Material Test Certificates), including tensile, hardness, and chemical data. This documentation ensures compliance with ASTM, DIN, or ISO fastener standards.

Design for Manufacturability (DFM)

We guide clients in selecting suitable materials for thread rolling, head forming, and plating compatibility. Our DFM support ensures your fasteners are both cost-effective and high-performing in end-use conditions.

Cost & Lifecycle Optimization

PRIME helps you compare not just raw material prices, but also performance over time. We account for plating life, vibration resistance, torque retention, and total cost of ownership — making your sourcing smarter and more profitable.

Common Fastener Materials and Their Characteristics

The Alloy Raw Material Preparation

All those above noted raw material forged and change into wire state prepared for manufacturing this way can save for alloy steel, aluminum, carbon steel,stainless steel, zinc alloy,copper and brass

Fourth: Functional and Protective Finishes for Fasteners

Protect your investment. The right surface finish is critical for durability and fighting corrosion. PRIME uses industry-leading processes specifically chosen for your fastener’s environment and performance requirements.

1.Zinc Plating (Cr3+):A lightweight yet protective zinc finish with color options.

2.Hot-Dip Galvanizing:A thick zinc layer (80-100μm) designed for severe environments.

3.Nickel & Chrome Plating:Enhances appearance and durability for decorative or high-wear parts.

4.Phosphate Coating:Enhances paint adhesion and rust prevention, commonly specified for automotive fasteners.

Black Oxide:Minimizes glare and provides basic rust protection, making it perfect for indoor tool fasteners.

5.Dry Film Lubricants:Used on fastener threads to ensure consistent clamping force and prevent seizing.

Fifth: Precision Tooling for Fastener Production

High-quality fasteners begin with high-precision tooling. PRIME designs and manufactures threading dies, cold heading molds, and trimming tools in-house to achieve dimensional accuracy

1.Thread Rolling Dies: Precision-ground HSS or carbide dies ensure consistent threads for each production run.

2.Heading & Trimming Dies: High-strength steel tooling supports complex head forms and special features.

3.CNC Machined Tooling: ±0.01 mm tolerance for dies used in high-speed multi-stage machines.

4.Die Coatings: PVD, TiCN, and nitriding treatments extend tooling life and reduce galling.

5.Trial Runs & Validation: All tools are tested in actual production speed to validate repeatability and lifespan.

Sixth: Our Manufacturing Quality Protocol

1.Material Traceability: Full documentation with MTCs (Material Test Certificates) including chemical and mechanical data.

2.Process Control: Torque testing, plating thickness, thread profile inspection performed in-line.

Dimensional Inspection: 100% sampling with GO/NO-GO gauges and precision measurement tools.

3.Mechanical Testing: Tensile, hardness, shear, and fatigue tests per ASTM, ISO, or DIN standards.

4.Packaging & Compliance: Labeled, barcode-tracked packaging with RoHS/REACH/COC documents included.

Quality Control Inspection Process for Fasteners

1.Raw Material Verification

Incoming Inspection: Check steel, stainless steel, or alloy bar/wire against purchase orders.
Certificates Review: Verify mill certificates for chemical composition and mechanical properties.
Surface Condition: Inspect for rust, scale, cracks, or other surface defects.

2.In-Process Monitoring

Cold/Hot Heading Inspection: Ensure proper head formation and shank straightness during forging or heading.
Thread Rolling/ Cutting Check: Verify pitch, depth, angle, and completeness of threads using gauges.
Dimensional Spot-Check: Operators perform random checks with calipers, micrometers, and plug gauges at intervals.

3.Heat Treatment & Surface Treatment Validation

Hardness Testing: Rockwell or Vickers hardness checks after heat treatment to confirm mechanical strength.
Microstructure Examination: Sampling to ensure correct grain size and structure.
Coating/Plating Control: Thickness measurement of zinc, nickel, or phosphate coating; adhesion and uniformity inspection.

4.Final Dimensional Inspection

Critical Dimensions: Measure length, diameter, thread pitch, concentricity, and tolerance compliance.
Functional Tests: Use GO/NO-GO thread gauges, torque testing, and tensile load testing according to standards (e.g., ISO, DIN, ANSI).
Appearance Check: Inspect surface finish, color uniformity, and absence of burrs or cracks.

5.Performance & Reliability Testing

Salt Spray Test (Corrosion Resistance): Simulate harsh environments to evaluate coating durability.
Fatigue Test: Check load-bearing and cyclic stress resistance.
Assembly Test: Ensure compatibility with mating parts and smooth fastening/unfastening.

6.Packaging & Traceability Control

Labeling: SKU, batch number, heat number, and QC approval code attached.
Packaging: Use VCI bags, anti-corrosion coatings, and palletized cartons to prevent damage.
Final Release: QC manager signs off inspection reports; only approved lots are released for shipment.

Seventh：Avoiding Fastener Failures: PRIME's Quality Assurance Approach

In critical applications, there’s no room for error. A single flawed fastener can compromise entire systems. That’s why PRIME integrates rigorous process controls, complete material traceability, and state-of-the-art inspection technologies. This unwavering commitment to quality guarantees you receive flawlessly engineered fasteners that perform reliably, every time.

1. Thread Inconsistency

Description: Irregular or damaged threads due to tool wear, misalignment, or poor lubrication.
PRIME Solution: Precision thread rolling dies, real-time tool monitoring, and post-process thread gauges ensure consistent thread profiles.

2. Cracks & Fractures

Description: Cracking at the head, shank, or thread caused by improper heat treatment or cold work stress.
PRIME Solution: Controlled heat treatment, material stress relief, and 100% magnetic particle or dye penetrant inspection reduce fracture risk.

3. Surface Corrosion & Coating Peeling

Description: Rust or flaking from inadequate plating, poor surface prep, or exposure to harsh environments.
PRIME Solution: Automated electroplating lines, anti-corrosion coatings, and salt spray testing extend durability and adhesion.

4. Dimensional Inaccuracy

Description: Deviations in length, diameter, or thread pitch that affect fit or torque performance.
PRIME Solution: CNC process control, automated in-line measurement, and CMM inspection ensure dimensional compliance to drawing specs.

5. Burrs & Sharp Edges

Description: Residual metal edges from machining or trimming processes leading to handling hazards or assembly issues.
PRIME Solution: High-speed deburring machines, ultrasonic cleaning, and manual QC eliminate all sharp burrs before packaging.

Eighth：Selecting a Custom Fastener Manufacturing Partner

Selecting the right supplier for custom metal fasteners is critical for safety, durability, and controlling long-term costs. Look beyond the price per piece and evaluate their knowledge of materials, precision manufacturing, finishing options, and ability to ship internationally. These are the key factors to consider when choosing a manufacturer you can trust.

1.Standards & Regulations

2.Materials & Production

3.Accuracy & Quality

4.Scale & Responsiveness

5.Design & Customization

6.Packaging & Global

PRIME is a specialist in custom fastener manufacturing. We manage the entire process in-house—from cold forming and threading to finishing and inspection. With over 10 ISO-certified production lines, we deliver high-precision fasteners trusted by the automotive, energy, and heavy equipment industries globally.

Ninth：Optimizing Fastener Designs for Manufacturing

Get expert help to refine your custom fastener design for lower cost, higher strength, and easier mass production.

Buyer’s concern: “This fastener is custom. I’m unsure about tooling costs, load strength, and whether the threads will roll properly. Can it be produced efficiently?”

PRIME’s upfront DFM review goes beyond basic manufacturability—we validate thread class, lead-in/chamfer, and rollability; optimize head shapes for forming and drive engagement; balance tolerance schemes for fit and cost; and compare materials and treatments for strength, durability, and price. The result is a production-ready design aligned to your operating conditions.

1.Engineering Analysis and Digital Design Improvement

We review your fastener designs to confirm that key features like threads, heads, and shafts are ideal for cold heading and rolling. We also recommend simplifying shapes to extend tool life and ensure smoother production.

2.Maximizing Value: Getting the most out of your materials and budget

Picking the Right Metal: We help you choose the best material—like carbon steel, stainless, brass, or titanium—based on your needs for rust resistance, strength, and cost.
Smarter Shank Sizing: We calculate the perfect starting diameter for the shank to use less material during thread rolling and minimize wasted machining.
Plan Ahead for Strength: We define the required strength level from the start to prevent heat treatment problems like cracking or brittleness later on.

3.Optimized Thread Creation Part Shaping

Checking for Rolled Threads: We verify that the thread’s specifications are designed to be made by rolling, ensuring a high-quality, strong result.
Crack-Free Forming: The geometry is designed so metal can flow smoothly into the head and shank without splitting or developing flaws.
Optimizing Head Shape: We advise on the best angles, grooves, and widths for the fastener head to extend tool life and ensure torque is applied effectively.

4. Guaranteed Fit and Function

Precision Fit: We select the exact tolerance grade for your fastener to ensure it fits your mating part perfectly, preventing damage from being forced in.
Accounting for Coating: We slightly undersize parts before coating so that after zinc, phosphate, or Dacromet is applied, they still fit perfectly and don’t get stuck.
Ensuring a Secure Connection: We analyze the fit between mating threads to make sure you can achieve the proper tightness

Tenth：Engineering Custom Fasteners: Methods, Advantages, and Uses

Choosing the right fastener is critical. Buyers often need to decide between cold heading, CNC machining, or a combination of both, as each method has unique advantages

At PRIME, we don't believe in a one-size-fits-all solution. We custom-manufacture fasteners to your exact needs, including material, strength, thread type, and precision tolerances

Cold heading is a room-temperature process that shapes metal into bolts, screws, and rivets by pressing it into a die. It’s perfect for efficiently making large quantities of strong, identical fasteners.

Superior Strength: The process preserves the metal’s natural grain structure, resulting in greater resistance to pulling (tensile) and twisting (shear) forces.
Fast production: Our automated systems have multiple workstations, allowing us to make huge quantities of parts quickly and with very few pauses.
Saves Money: The process wastes very little material, works quickly, and the tools don’t need to be replaced often.

CNC Machining: Ideal for high-accuracy parts, prototyping, and complex thread forms.

Dimensional Precision: Holding tight tolerances on critical features like threads, shanks, and shoulders.
Design Freedom: Accommodates complex features like undercuts, recesses, drive systems, and internal channels.
Broad Material Capability: Processes a wide range of materials including stainless steel, Inconel, titanium, and various plastics.
Quick-Change Prototyping: Eliminates expensive tooling and allows for fast design changes during research and testing.
For custom orders: We offer specialty threads (ACME, UNF, metric fine), special coatings, and product marking.

Eleventh：Global Network, Local Precision: Your Custom Fasteners Delivered

Manufacturers and distributors, reliable delivery is just as critical as precision fasteners. With 30+ years of international expertise, PRIME guarantees secure packaging, on-time fulfillment, and complete supply chain visibility – wherever your operations span

Buyer Concern “We import fasteners in bulk for manufacturing. How do we ensure customs compliance, cost control, and undamaged delivery?”

From cold heading line to warehouse dock, Prime manages every step of your logistics — ensuring smooth cross-border shipping, proactive tracking, and precision-packed fasteners that arrive ready to use.

1.High-Accuracy Machining & Threading

Thread Rolling and Lathe Turning: Manufacture of accurate internal and external threads
Precision Slotting & Grooving: Machining keyways, circlip grooves, and custom profiles.
Micron-Level Tolerancing: Finishing to exacting standards for critical use.

2. Real-Time Freight Visibility

See your shipment’s journey: packing photos, vessel/truck IDs, and constantly refreshed arrival times

3. Industrial-Grade Fastener Protection

Heavy-Duty Stackable Containers – Reinforced Corner Design.
Advanced Corrosion Prevention – VCI Bags, Desiccants & Protective Coatings.
Guaranteed Damage-Free Transit: Custom foam inserts and dividers for mixed fastener shipments

4.Custom-Tailored Shipping Options

Express Air: Ideal for prototypes or emergency replenishment
FCL/LCL Ocean Freight: High-volume delivery at lowest landed cost
Hybrid Routes: Strategic blend of rail, road and sea transport for major project shipments

PRIME’s Edge in Precision Logistics

Work with Prime for managed global fastener logistics that minimize delays, ensure reliable delivery, and guarantee high-quality packaging.

Twelfth：Precision Fasteners Backed by Unmatched Service

1.Advanced Material Science & Engineered Alloys

We engineer carbon steel, stainless, aluminum, brass, and nickel alloy fasteners—precision-tuned for strength, corrosion resistance, or weight savings in critical applications.

2. Eco-Conscious Fastener Manufacturing

Our research team pioneers eco-friendly production through:

Energy Efficiency: Lower your Scope 3 emissions with our energy-efficient forming

Waste Reduction: Chip-free manufacturing maximizes material value

3. Joint Engineering for Application-Specific Solutions

Co-developed solutions for unique challenges: anti-loosening threads, dielectric barriers, integrated washers, and precision torque features – scaled from concept to volume production.

4. Co-Engineering & Functional Customization

We collaborate closely with clients to develop non-standard fasteners — including anti-vibration features, insulation barriers, captive washers, and torque-control geometries — from prototype to production.

PRIME's Fastener Innovation Edge:

Prime transforms fastener potential through advanced materials, smart manufacturing, and collaborative engineering – delivering tomorrow’s solutions today.

Thirteenth：Value-Added Services: Complete Support for Custom Metal Fasteners

Global fastener procurement becomes more efficient with integrated services that guarantee quality and faster delivery. PRIME delivers comprehensive solutions for custom fasteners, from precision machining to final packaging.

Buyer Concern "I need a fastener supplier who not only produces but can also finish, assemble, label, and pack the parts for immediate integration into my supply chain."

With in-house precision machining, packaging, and inspection capabilities, PRIME provides end-to-end control over fastener production — from raw material to export-ready delivery.

PRIME's Full-Spectrum Fastener Services

With in-house precision machining, packaging, and inspection capabilities, PRIME provides end-to-end control over fastener production — from raw material to export-ready delivery

1. High-Accuracy Machining & Threading

Thread Rolling and Lathe Turning: Manufacture of accurate internal and external threads
Precision Slotting & Grooving: Machining keyways, circlip grooves, and custom profiles.
Micron-Level Tolerancing: Finishing to exacting standards for critical use.

2. Assembly Preparation & Kitting

All-In-One Fastener Kits: Combining the nut, bolt, and washer.
Pre-Coated Locking Fasteners: The simple solution for vibration
Pre-Shipment Quality Checks: Visual inspection and torque testing for reliability.

3.Custom Crating & Global Freight Management

Parts Bagging & Carton Labeling: Including polybags, barcodes, and QR codes.
Advanced Palletizing & Protective Packaging: Tailored solutions for any product.
Export Documentation & Pallet Marking: Ensuring smooth customs clearance.

4.Precision Thermal Processing

Quenching and Tempering: The balanced approach to metal properties.
Post-Machining Stabilization: For dimensional stability in critical components.
Carburizing/Nitriding: For enhanced wear resistance in demanding environments.

5. Applied Coatings and Surface Treatments

Electroplated Zinc and Phosphate Coating: For rust prevention and a uniform finish.
Post-Fabrication Cleaning: Removes contaminants to restore stainless steel properties.
Burr Removal and Surface Finishing: Ensures proper assembly and a consistent look.

Fourteenth：Processing technology

Rolled Thread

Threaed by pressing and rollinRolled Thread is a metal-forming process where threads are creatg a blank between dies, rather than cutting. This produces stronger, smoother, and more precise threads, commonly used in screws and bolts.

Powder Metallurgy

Powder Metallurgy is a manufacturing process where fine metal powders are compressed into a desired shape and then heated (sintered) to fuse the particles together. It’s used to produce complex, high-precision parts with minimal waste, often for automotive, aerospace, and industrial applications.

Passivation

Passivation is a chemical process (often using nitric or citric acid) that removes surface contaminants and enhances a metal’s natural oxide layer. This improves corrosion resistance, particularly for stainless steel and other alloys.

Hot Foring

Hot Forging is a metalworking process where metal is heated (typically above its recrystallization temperature) and then shaped using compressive forces, such as hammers or presses.

Nickel Plated

Nickel Plating is an electroplating process that deposits a layer of nickel onto a metal (or plastic) surface for corrosion resistance, durability, and improved appearance.

Fifteen：Workflow Overview

To guarantee that every metal fastener meets precise customer specifications, we follow a rigorous nine-step quality assurance process, spanning from initial technical review to post-delivery validation

Step 1: Preparation of raw materials

The manufacturing of durable metal fasteners begins with high-grade raw materials—stainless steel, carbon steel, and aluminum alloys—all rigorously tested to meet exacting standards. Each batch undergoes chemical and mechanical verification to ensure strength, corrosion resistance, and compliance with ASTM/ISO specifications. This strict quality control guarantees reliable performance in critical applications while maintaining full material traceability from mill to finished product.

Step 2: Cutting and shaping

The raw material is precisely cuo size using mechanical or lat tser cutting for accuracy. It is then fed into forming equipment—such as stamping or thread rolling machines—for initial shaping. This step ensures dimensional consistency before further processing.

Step 3:Heat Treatment

To optimize strength and durability, metal fasteners undergo precise heat treatment.This controlled process involves heating, quenching, and tempering to transformthe material’s microstructure, significantly improving hardness and tensilestrength while maintaining essential toughness.

Step 4: Surface treatment

Metal fasteners receive protective coatings like zinc plating, powder coating, or electroplating to prevent rust and wear. These treatments extend product life while improving corrosion resistance and appearance for demanding applications.

Step 5:Machining

Following heat and surface treatments, fasteners undergo precise finishing operations including thread cutting, hole drilling, and end trimming. These final machining processes ensure every fastener meets exact dimensional specifications and functional requirements for reliable performance

Step 6: Quality inspection

Throughout manufacturing, we enforce rigorous quality control protocols. Every production batch undergoes comprehensive testing of critical parameters – dimensional accuracy, mechanical strength, thread precision, and surface integrity – to guarantee full compliance with international standards such as ISO, DIN, and ASTM specifications. Our certified inspection processes ensure only components meeting exacting tolerances proceed to shipment.

Step 7: Packaging and shipping

Following production and quality inspections, all fasteners undergo thorough cleaning and protective packaging. We offer customized packaging solutions—organized by batch, specification, or size—to ensure secure transportation and easy identification upon delivery.

Sixteenth：What Our Clients Said

Maximilian

Product Manager, PM

“Die Zusammenarbeit mit Prime hat unseren Fertigungsprozess erheblich rationalisiert. Ihre Präzision und schnellen Durchlaufzeiten waren ein Schlüsselfaktor für unseren Produktionserfolg.”

Kenta Sato

Purchasing manager,UACJ

“プライムとの協力により、製造工程が大幅に合理化されました。彼らの精度と迅速な納期は、私たちの生産成功の重要な要因となっています”

Elias Söderberg

Production Supervisor,Sandvik AB

“Att arbeta med Prime har avsevärt effektiviserat vår tillverkningsprocess. Deras precision och snabba handläggningstider har varit en nyckelfaktor för vår produktionsframgång.”

Seventeenth：Manufacturing & Packing at A Glance

Eighteenth：In Summary

The selection of a supplier for custom metal fasteners is a critical business decision with significant implications for product reliability, operational expenditure, and supply chain efficiency. This guide has detailed the essential considerations for procurement, encompassing material choice, production methods, quality standards, and global distribution.

What B2B Buyers Need to Know

Manufacturing Expertise: Ensure your supplier masters cold heading, thread rolling, and CNC finishing for strength and precision.
Reliable Quality Systems: ISO-certified processes, full dimensional inspection, and material traceability help reduce risk and defects.
More Than Unit Price: Evaluate tool life, assembly-readiness, delivery time, and engineering service — not just per-piece cost.
Collaborative Engineering: Suppliers who provide early design support and DFM insight help avoid future failure points.
Scalable Global Service: Partners with worldwide reach and local responsiveness prevent customs delays and support stable growth.

PRIME’s Competitive Edge

With over 30 years of experience, PRIME supplies custom fasteners for sectors including automotive, energy, construction, and machinery. From complex bolts to high-performance screws, our advanced facilities and certified quality systems ensure consistent, compliant output.

We go beyond manufacturing — providing design review, material selection, custom coatings, and full packaging support. From prototype to mass production, PRIME is your fastener sourcing partner.

Borderless Logistics, Grounded Trust

With optimized export packaging, streamlined customs documentation, and a proactive sales team, we guarantee timely deliveries and smooth international transactions.

From single-product orders to full-scale global deployments, PRIME provides tailored fastener solutions backed by flexible, scalable support—wherever your operations take you.

Receive a competitive quote within 24 hours

With Prime, you’ll receive a competitive quote within 24 hours — helping you save valuable time in sourcing decisions. Rapid response means you can compare costs, plan budgets, and accelerate your project schedule with confidence.

Simply Customize Metals

Finding top-quality custom metal parts doesn’t have to be complicated. At Prime, we guide you through it in three easy steps：

Three Decades of Trusted Production Experience, Delivered from Our Own Facilities

Custom-Designed Components Engineered for Your Specific Applications

Worldwide Delivery Network with End-to-End Logistics Services

Fast and Transparent Quotes with No Hidden Conditions

Your Designs and Information Stay Fully Confidential — Guaranteed

Let’s Start Production

After you confirm the design and pricing, we’ll start production and manage the shipping—making sure everything arrives on time.

Reach out to us for a free quote and expert advice on your custom hardware needs. At Prime, we’ll provide the right solution for your project, ensuring quality and precision every step of the way.