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For Screw Size
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Lock Washers

Lock Washers

Hold threaded fasteners in place. Lock washers have special features, such as teeth, that grip the material to prevent rotation.

Split

The most common lock washer type, split washers have offset ends that bite into fastener heads and fastened materials to lock in fasteners if they start to loosen.

18-8 Stainless Steel

316 Stainless Steel

Plain Steel

Zinc Plated Steel

Galvanized Steel

Black Oxide Steel

Zinc Flake Coated Steel

Blue Phosphate Steel

Yellow Zinc Steel

Chrome Plated Steel

Bronze

Aluminum

Wedge

Maximize locking power with wedge washers. These two-part ridged washers grip each other, the fastener, and the fastened material to hold everything in place.

Zinc Plated Steel

316 Stainless Steel

254 SMO Stainless Steel

Steel

Zinc Flake Coated Steel

Internal Tooth

Inner-diameter teeth grip the underside of fastener heads and dig into the fastened material to help prevent movement in low-torque applications.

Choose internal over external tooth washers for small-head fasteners, to resist snags, or to provide a more polished appearance.

410 Stainless Steel

18-8 Stainless Steel

316 Stainless Steel

Plain Steel

Zinc Plated Steel

Black Oxide Steel

Bronze

External Tooth

Teeth along the outer diameter dig into the underside of screw heads and the fastened material to prevent movement in low-torque applications.

Choose external over internal tooth lock washers when your screw or bolt head is nearly as wide as the washer's OD.

410 Stainless Steel

18-8 Stainless Steel

Zinc Plated Steel

Bronze

Countersunk

Keep countersunk screws in place. Angled external teeth on these washers grip flat- and oval-head screws to prevent movement.

410 Stainless Steel

Assortments

Zinc Plated Steel