Why Slots Are Provided in the Slotted Castle Nut?

Slots are provided in the slotted castle nut to allow for a positive stop when the bolt is tightened. The slots also help to keep the bolt from loosening by providing resistance to turning forces. The castle nut is tightened onto the bolt by first aligning the slots in the nut with the flats on the bolt head.

The nut is then rotated until it is tight against the bolt head. The last step is to secure the nut by inserting a cotter pin through the hole in the nut and the hole in the bolt.

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The purpose of a castle nut is to keep a screw or bolt from loosening due to vibration or impact. It does this by using a set of locking teeth, called serrations, that grip onto the bolt shaft.

The castle nut also has a slot cut into it so that a cotter pin can be inserted to lock the nut in place and prevent it from coming loose. Slotted castle nuts are used on many types of machinery, including cars, trucks, tractors, and lawn mowers.