The MTS 260-piece Split Pin Assortment (also known as Cotter Pins) is a comprehensive kit of essential safety fasteners. Split pins are used to secure bolts, pins, and shafts in place, typically passing through a hole in a "castellated" nut or a plain clevis pin to prevent components from vibrating loose or falling off.
Contents & Sizes
This kit is organized in a transparent, partitioned case and generally includes the following 6 popular metric sizes:
- 1.6 x 25 mm: 50 Pieces
- 2.4 x 25 mm: 50 Pieces
- 2.4 x 38 mm: 50 Pieces
- 3.2 x 30 mm: 50 Pieces
- 3.2 x 50 mm: 30 Pieces
- 4.0 x 64 mm: 30 Pieces
Key Features
- Zinc Plated Steel: The pins are treated with a zinc coating to provide basic corrosion resistance, making them suitable for most indoor and general automotive environments.
- Malleable Design: Made from soft, ductile steel that allows the legs to be easily bent by hand or with pliers without snapping, ensuring a secure lock.
- Bulbous Head: The circular head acts as a stop to prevent the pin from pulling through the hole, while the two legs are spread apart to lock it on the opposite side.
- High Visibility: The bright zinc finish makes it easy to visually inspect safety-critical joints to ensure the pin is present and correctly installed.
Common Applications
- Automotive: Securing castle nuts on wheel bearings, tie-rod ends, and ball joints.
- Agriculture: Locking hitch pins on tractors, trailers, and ploughs where heavy vibration is constant.
- Mechanical: Securing clevis pins in linkage systems and brake rod assemblies.
- DIY: General repairs on bicycles, go-karts, and garden machinery.
Installation Tip: The "Safety Bend"
For a professional and secure installation:
- Insert the pin through the hole until the head is flush against the part.
- Use pliers to bend the legs in opposite directions.
- Pro-Tip: One leg should be bent back over the end of the bolt/pin, and the other bent down against the side. This prevents the pin from "rattling" and reduces the risk of the sharp ends catching on clothing or skin.



