304 Stainless Steel U-Type Spring Cotter Hair Pins M1–M10

$19.15 $21.65

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Diameter

Length

304 Stainless Steel U-Type Spring Cotter Hair Pin Clips

Keep your mechanical assemblies secure and shake-free with these heavy-duty U-Type Spring Cotter Hair Pins made from premium 304 (A2-70) stainless steel. Whether you're working on automotive components, farm tractors, machinery, or DIY fabrication projects, these open elastic clips deliver outstanding holding strength, corrosion resistance, and long-lasting performance in virtually any environment.

Made in Mainland China.

Key Features

Material: 304 (A2-70) stainless steel — rust-resistant, durable, and ideal for indoor and outdoor use
Type: U-Shape / Hair Pin Spring Cotter Clip
Wide Size Range: Rod diameters from 1mm up to 10mm; lengths from 8mm up to 100mm — a size for virtually every application
Secure Locking: Spring-tension design keeps the pin firmly in place under vibration and mechanical stress
Versatile Applications: Suitable for automotive, tractor, agricultural equipment, machinery, and general hardware use
Customizable: Available in multiple size combinations to match your exact specification

Specifications

Material	304 (A2-70) Stainless Steel
Pin Type	U-Shape Spring Cotter / Hair Pin
Rod Diameters	1 / 1.2 / 1.5 / 2 / 2.5 / 3 / 3.2 / 4 / 5 / 6 / 6.3 / 8 / 10 mm
Lengths	8 / 10 / 12 / 16 / 20 / 25 / 30 / 35 / 40 / 45 / 50 / 60 / 70 / 80 / 90 / 100 mm
Customized	Yes
Origin	Mainland China

Common Applications

Automotive chassis and suspension pin retention
Tractor and agricultural equipment linkages
Industrial machinery and conveyor systems
General-purpose hardware and DIY fabrication
Marine and outdoor equipment (corrosion-resistant grade)

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Frequently Asked Questions

Q: What material are these U-type spring cotter hair pins made from?

A: These cotter pins are manufactured from 304 (A2-70) grade stainless steel, which provides excellent corrosion resistance, high tensile strength, and long service life — making them suitable for both indoor and outdoor applications including automotive and agricultural use.

Q: What sizes are available for these U-shape spring cotter clips?

A: The pins are available in rod diameters ranging from 1mm to 10mm (including 1, 1.2, 1.5, 2, 2.5, 3, 3.2, 4, 5, 6, 6.3, 8, and 10mm) and lengths from 8mm to 100mm (including 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, and 100mm). This wide range covers most standard mechanical applications.

Q: Are these cotter pins suitable for use on tractors and automotive applications?

A: Yes. The U-type spring cotter hair pin design is widely used in tractor linkages, automotive chassis components, and general machinery assemblies. The spring tension ensures the pin stays securely locked even under vibration and dynamic loads.

Q: Can I order a custom size combination?

A: Yes, these pins are listed as customizable. Please select your desired rod diameter and length from the available options when placing your order, or contact us if you need a specific combination not listed.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.

We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.