Cotter Pins
Originally a ‘belt and braces’ device for industry for the prevention of unscrewing nuts from shafts and for restraining errant Clevis pins, the Cotter Pin has developed into numerous designs for newer applications in engineering.
Split cotter pins are crafted from robust wire, forming a semi-circular cross-section for added strength. Each pin features two separate legs connected at one end by a round head. When used, the pin is inserted into a pre-drilled hole—commonly found in shafts or bolts—until the head sits flush against the surface.
To secure the assembly, simply spread the two legs in opposite directions once the pin is in place. This bending action locks the pin, preventing it from backing out and effectively holding all components together. This simple yet reliable mechanism is what makes split cotter pins a popular fastening choice for mechanical assemblies.
Pinstructure supplies KN Products Split Cotter Pins, UK’s sole manufacturer of Split Cotter Pins in five major materials:
- Brass CZ108
- Copper C101
- Mild Steel
- Phosphor Bronze PB102
- A2 (304) and A4 (316) Stainless Steel
We can also manufacture from Monel 400 to request.
These are manufactured to the following national and international standards: ISO 1234, BS 1574 and DIN 94.
Due to the development of our works machinery, many varied shapes are capable of being produced in volume. Please contact us for further information.
