Split Cotter Pins are used primarily for precise location and light shear duty between two parts. This page summarizes where they fit, the industries that rely on them, and the practical points to get right when you specify them — to ISO 1234 / DIN 94. Stocked across roughly M0.6 to M13, they cover general to heavy-duty work.
Typical Applications for Split Cotter Pins
The most common settings where these are specified:
- Linkages & hinges: pivot points carrying light shear.
- Machine alignment: dowelling mating housings so they reassemble in the same position.
- General machine building: fastening covers, brackets, motors and sub-assemblies on production equipment.
- Maintenance & repair (MRO): a stocked size for servicing existing plant where the original fastener spec must be matched.
- Fabrication & metalwork: bench and on-site assembly of steel frames, enclosures and weldments.
How to Specify Split Cotter Pins for Your Application
- Size: Match the nominal size to the mating thread or hole. This product spans M0.6–M13; check the full table below for the exact dimensions of each size.
- Material: Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
- Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
- Standard: This product is supplied to ISO 1234 / DIN 94. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.
Where Split Cotter Pins Are Not the Right Choice
Not for carrying significant tensile or repeated heavy shear loads — use a bolt or a keyed joint for that.