Hillman 5/16 In. Alloy Steel Yellow Dichromate Split Lock Washer (100 Ct.)

Hardened, yellow dichromate split lock washer prevents nuts and bolts from turning, slipping, and coming loose because of vibration and torque. Grade 8. These fasteners contain split ends that help "lock" into the mating material, thus providing a locking feature when tightened beneath a nut.