Cotter Pin Split Pin Castle Nut

Difference between cotter pins and split pins.

Cotter pin split pin castle nut.

You obviously need a cotter pin there to keep the nut from backing out. Use cotter pins to lock a castle nut or secure a clevis pin. Castellated nuts are used in low torque applications such as holding a wheel bearing in place. A split pin has two long tines that are bent to hold it in place.

They re not recommended for use on parts exposed to high vibration because the pin is prone to shearing under prolonged stress. Castle nuts with securing cotter pins are primarily used on spindles with wheel bearings front wheels on a rear wheel drive car for example where the castle nut is adjusted to be only fingertight. Secure these nuts by inserting a cotter pin or safety wire through the slots and a drilled hole in your bolt for mild loosening resistance. The nut is then secured with a split pin cotter pin r clip or safety wire.

However when the nut is torqued to something like 70 or 80 ft lbs there. Cotter pins are made of mild steel and are used for locking nuts at the place. They re also known as castle nuts and slotted nuts. Cotter pins are commonly used in clevis pins as it has a premade hole in it.

Hairpin clips also called r clips are designed to slip on with no bending required. Height includes the slots. A cotter pin is easy to install and remove and is commonly used to secure a wheel or machine component on an axle. You have to drill a small hole into the bolt to use it.

In this video one of our resident fastener specialists talks about castle nuts. It is a positive locking device. Cotter pin is a fastener used for locking the nuts onto the bolts.