Flex Type Hex Lock Nut Thin Height Heavy Hex Cadmium and Wax

An all-metal, one-piece, hex-shaped lock nut with a round collar at its back end. The collar is segmented with opposed slots cut into it above each corner of the nut. When the screw or bolt reaches the collar, the slotted portion expands which creates the prevailing torque locking action. The heavy hex, thin height variety is approximately 30% shorter than the full height nut.