What is a Spring Lock Washer?

Spring Lock Washers are a common form of Washer.

They help with the prevention of fasteners becoming loose during vibration. Spring Lock Washers contain a split so that when tightened each side, they bite into the nut and mounting surface. This helps against any anti-vibration rotation that may occur during vibration.

Spring Washers
SPRING WASHERS SINGLE COIL TO DIN 127B