Slotted Castle Nut is a special type of mechanical fastener with a hexagonal shape provided with slots over each edge of the element. It is made by forging and machining process to make a highly finished and dimensionally accurate fastening elements. It can be used in various industrial applications for the locking and positioning after tightening. The joint can be secured by entering a metal pin through the slots. It is available in many different sizes with diameter in between 6 to 38 millimetres.