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Hillman
Stainless steel split lock washer prevents nuts and bolts from turning, slipping, and coming loose because of vibration and torque. These fasteners contain split ends that help 'lock' into the mating material, thus providing a locking feature when tightened beneath a nut.
Hillman Yellow Dichromate Grade 8 Hex Cap Screw 1/2" x 2-1/2"
Hillman Yellow Dichromate Grade 8 Hex Cap Screw 1/2" x 6"
Hillman Yellow Dichromate Grade 8 Hex Cap Screw 3/8" x 4"
Hillman Zinc Flat Head Phillips Sheet Metal Screw #4 x 3/4"
Hillman Zinc Hardened Nylon Insert Grade C USS Coarse Stop Nut 1/4"-20