Castle & Slotted Nuts
Slotted Nuts are standard nuts The contours and the depth of the slots are designed to give strength characteristics of the slotted nut when in the application. Slotted nuts are available in a range of strength grade property classes, both in the heat-treated and non-heat treated condition. The designating of the strength grades is shown in all the standards and must be identified by marking the nut. The application of slotted nuts is with a locking cotter pin, R pin, coiled pin, split pin or taper pin; these lock the slotted nut into position after tightening. The pin is inserted through the slot and a hole passing through the fastener eliminating the nuts ability to back off and securing the assembly.