Slotted Nuts

A slotted nut has slots cut into one end of the nut. When used in application the bolt or threaded bar generally has a predrilled hole so when the slotted nut is threaded on and torqued to the required position it can then be secured using a cotter pin or wire to prevent rotation. Thus slotted nuts are used in applications where vibration or motion might otherwise undo the nut.

Although both the castle nut and slotted nut look similar and can often be used interchangeably because they have almost identical dimensions, they are different in that the protrusions on a slotted nut are from the base of the nut and include the corners, whereas a castle nut looks like a standard nut with triangular portions protruding but not including the corners of the hex.

This is a castle nut

Slotted nuts are generally manufactured from steel grade 4, 8 and 10 and Stainless Steel A2 & A4.
Our Grade 8 slotted nuts are stocked in sizes M12 to M24 in a self-colour finish, manufactured to BS3692.
BSF, BSW, UNC & UNF are usually available from stock, 1/4″ to 3″.

Other sizes and materials are available to order with short lead times.

Fastenright Ltd holds various sizes of slotted and castle nuts in stock in grades 4, 8 and 10 for fast delivery.

Our Grade 8 slotted & castle nuts are stocked ranging from M12 to M24 in a self colour finish, manufactured to BS3692.

Other sizes and materials are available to order with short lead times.

BSF, BSW, UNC & UNF are available from 1/4″ to 3″ with other sizes made to order.