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304/316 Stainless Steel Clevis Pins from China Suppliers | Factory Flat Head Hitch Pins for Mechanical Assembly

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Name: Hole-mounted Flat-Head Pins (Clevis Pin / Plug Pin / Cotter Pin Matching Pin / Hitch Pin)
Material: Premium AISI 304/316 Stainless Steel (corrosion resistant, rust resistant) and durable 5# steel / 40Cr alloy steel
Standards: Compliant with GB/T 882, GB/T 91, ISO 2341, DIN 1443, DIN 1444
Grade: High-quality Stainless Steel A2 (30/ A4 (31and Carbon Steel Grades 8.8 / 10.9
Specifications: Available in sizes ranging from 3mm to 50mm (customizable options available)
Surface Treatment: Natural polishing and passivation treatment (no coating, offering enhanced corrosion resistance), with optional electro-galvanizing, hot-dip galvanizing, or blackening treatment for improved rust and wear resistance
Design Features: Engineered with a perforated flat head structure and high-gloss shaft surface made from corrosion-resistant stainless steel, featuring various specifications and high tensile strength
Applications: Widely used in mechanical engineering, lifting equipment, automotive and trailer industries, as well as industrial and marine engineering
Delivery Time: 15-30 days after advance payment
Origin: China
Brand: JGD
Minimum Order Quantity: 10,000 pieces, negotiable
Samples: Available upon request
Packaging: Boxed, Bulk, Pallet, or customized packaging options
OEM: Available to meet specific requirements

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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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    Key Features

    Our self-tapping screws are crafted from food-grade 304 stainless steel and treated to achieve metric Grade 12.9 ultra-high strength, overcoming the traditional hardness limitations of standard stainless steel. Featuring a countersunk Phillips head design, these screws can be installed flush with the workpiece surface for a zero-profile finish, making them ideal for precision electronics and architectural decoration. We have optimized the thread geometry for different substrates (metal, wood) to ensure low-torque driving with high-torque clamping, effectively preventing stripping. As a superior alternative to standard Tek screws, these fasteners perform exceptionally well in thin sheet metal connections, providing an intelligent fastening solution that balances aesthetics with high load-bearing capacity.
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    Precision Manufacturing Process

    From wire rod to finished product, we strictly adhere to multiple international standards including ISO, DIN, ANSI, and GB. Utilizing multi-station cold forging technology, we ensure shank diameter tolerances are controlled within microns. Threads are formed through a precision thread rolling process to enhance fastening force. For non-standard requirements, we employ optical imaging sorters to reject minute defects like head cracks. In post-treatment, we offer a wide range of surface finishing options: from conventional zinc plating and nickel plating to highly corrosion-resistant Hot-Dip Galvanizing (H.D.G.), as well as decorative polishing and black anodizing. We even provide food-grade passivation treatment, ensuring every screw has a prolonged fatigue life in demanding environments.
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    Transparency & Customization

    As a source factory, we are committed to breaking down the information barriers of traditional trade. From mill certificates for raw materials to hardness grades (covering Grade 4.8 to Grade 12.9, as well as A2-70 and A4-80 marine-grade stainless steel), all test data is traceable. We support full-chain customization: dimensionally, we can adjust thread length and head thickness according to drawings; functionally, we can combine processes like sandblasting, electrophoretic coating (e-coating) , or chrome plating. Whether you need British Standard (BS) fasteners or require a special colored anodized finish, we offer small-batch sampling. This ensures that when you purchase fasteners from us, you not only receive high-quality products but also full transparency and control over the entire process, from material selection to packaging.
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    No Pre-Drilling · Rust Resistant · More Secure

    This stainless steel Phillips countersunk self-tapping screw, with its rust-resistant and corrosion-resistant material, one-step self-tapping design, and aesthetically pleasing countersunk head structure, has become the preferred solution for metal substrate fastening scenarios that is efficient, reliable, and aesthetically pleasing.
    Product Details

    Manufacturing Process

    Manufacturing Process

    Multi Station Cold Heading Technology
    Intelligent Heat Treatment System
    Micron-Level Thread Rolling Process
    Fully Automatic Optical Sorting
    Environmentally Friendly Surface Treatment Line
    Metallographic And Mechanical Joint Laboratory
    Quality Control System

    Quality Control System

    Raw Material Source Locking
    Furnace Number Batch Full Traceability
    Third Party Material Certification
    Process Parameters Open And Transparent
    Salt Spray Test Real Time Monitoring
    International Standard Compliance Declaration
    Flexible Customization Capability

    Flexible Customization Capability

    Customizable head/slot Shapes
    Extreme Application Of Special Materials
    Breakthroughs In Extra Large/Long Specifications
    Integrated Assembly Of Components
    Customizable Surface Treatment Colors
    Personalized Packaging And Labeling
    Technical Service

    Technical Service

    On-Site Failure Analysis
    Selection Calculation And BOM Optimization
    Installation Tool Selection Guidance
    Inventory Management (VMI) Trusteeship
    Free Sample Making And Testing
    International Standard Translation And Interpretation
    Multi-Material Series

    Multi-Material & Full Strength Series

    Our clevis pins are made of AISI 304/316 stainless steel or 45#/40Cr alloy steel, with strength grades including A2-70 (304), A4-80 (316), and carbon steel grades 8.8/10.9. The 316 stainless steel version offers exceptional chloride corrosion resistance, passing ≥720 hours of salt spray testing to withstand harsh coastal and humid environments. Carbon steel options with electro galvanizing, hot-dip galvanizing, or black oxide finishes balance high strength and rust/wear protection. With diameters ranging from 3mm to 50mm, they adapt to various load and application requirements.

    Standardized Precision Design

    Standardized Precision Design for High Fit

    Manufactured to international standards including GB/T 882, ISO 2341, and DIN 1443, our pins feature a flat head with cross-hole and high-precision polished shaft. The smooth shaft minimizes wear during installation and operation, extending service life. When paired with cotter pins or R-clips, they provide dual anti-loosening security. The evenly distributed load on the flat head ensures stable performance under dynamic loads in lifting equipment and mechanical engineering, eliminating the risk of loosening or dislodgement for safe connections.

    Quick-Install Design

    Quick-Install Design for Efficient Assembly

    The cross-hole design allows fast locking with cotter pins: simply insert the pin through the clevis, secure it with a cotter pin spread open in the hole, and the connection is complete. No special tools are needed for disassembly, greatly improving assembly and maintenance efficiency. Customizable lengths suit applications from automotive trailers to marine equipment and industrial machinery. The low-friction polished shaft also reduces installation resistance, making them ideal for both mass production and on-site retrofits with excellent versatility.

    Application Scenarios

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    High-Quality Stainless Steel Self-Tapping Screw Display

    Frequently Asked Questions

    Q1: What materials are your clevis pins available in?
    We offer AISI 304 and 316 stainless steel for superior corrosion resistance, as well as 45# and 40Cr alloy steel for high-strength applications (grades 8.8 and 10.9).
    Q2: Do your products comply with international standards?
    Yes, our manufacturing process adheres to standards such as GB/T 882, ISO 2341, and DIN 1443 to ensure precision and compatibility.
    Q3: Can I customize the dimensions or surface treatment?
    Absolutely. We provide flexible customization for diameters (3mm-50mm), head shapes, slot types, and various finishes like hot-dip galvanizing or black oxide.
    Q4: How do you ensure the quality and durability of the pins?
    We implement full batch traceability, raw material source locking, and real-time salt spray monitoring (up to 720 hours) in our metallographic and mechanical joint laboratory.
    Q5: What technical support do you provide for bulk orders?
    We offer on-site failure analysis, BOM optimization, selection calculation, and free sample making to ensure the perfect fit for your specific application.
    Q6: Are these pins suitable for marine environments?
    Yes, our 316 stainless steel series is specifically designed for marine and coastal environments, offering exceptional resistance to chloride corrosion.