Reliable Locking Solutions with Industrial Cotter Pins
Our Cotter Pins (or Split Pins) are the most cost-effective and reliable method for securing heavy-duty mechanical connections. Designed to be used with clevis pins or castellated nuts, these wire fasteners provide a physical barrier that prevents accidental loosening caused by vibration or rotational forces. Whether in automotive suspensions, agricultural machinery, or marine rigging, our pins offer a permanent yet simple locking mechanism.
We offer Standard Split Pins (DIN 94) for permanent fixings and R-Clips (Hairpin Cotters) for applications requiring frequent disassembly and reuse.
Types of Cotter Pins We Supply
Standard Split Pins (DIN 94)
The classic choice. Half-round wire with a loop head, designed to be bent open once installed for a permanent lock.
R-Clips (Hairpin Cotters)
Spring-loaded design that snaps onto a shaft. Ideal for quick-release applications and repeated use.
Lynch Pins & Bow-tie Pins
Heavy-duty pins featuring a locking ring or specialized shape for extreme security in agricultural hitches.
| Nominal Size (mm) | Actual Wire Dia. | Hole Size (min) | Standard Lengths |
|---|---|---|---|
| M2.0 | 1.8 mm | 2.0 mm | 10 – 40 mm |
| M3.2 | 2.9 mm | 3.2 mm | 16 – 63 mm |
| M5.0 | 4.6 mm | 5.0 mm | 25 – 100 mm |
| M8.0 | 7.5 mm | 8.0 mm | 40 – 160 mm |
Ductility & Corrosion Resistance
The safety of a Cotter Pin depends on its material properties. We ensure quality through:
- High Ductility Steel: Our pins can be bent 90 degrees or more multiple times without stress cracking or failure.
- Marine Grade SS316: Essential for salt-water rigging, offering maximum lifespan in corrosive environments.
- Smooth Edges: Tumble-polished to remove burrs, preventing injury during installation and ensuring a clean fit.
Q: How do I choose the right size Split Pin?
A: The diameter of the split pin should be as close as possible to the hole diameter without forcing it, ensuring minimal play. The length should be long enough to extend at least 2x the diameter past the hole for a secure bend.
Q: Are Cotter Pins reusable?
A: Standard DIN 94 Split Pins are designed for one-time use because bending weakens the metal. For applications requiring frequent removal, use our R-Clips or Lynch Pins.
Wholesale Supply for Standard & Custom Cotter Pins
Looking for a factory for Bulk Split Pins or specialized Hairpin Cotters? We provide competitive pricing and full material certifications. Contact us today for samples!
