Package of 50!

#4 Internal Tooth Lock Washer, 410 Stainless Steel for #4 (4-40) size screws.

Specifications
Military Specification Internal Tooth Lock Washer
Specification: MS35333-70
Washer Size: #4
Type: Tooth Lock Washer
Style: Internal
Material: 410 Stainless Steel
Finish: Plain
Outside Diameter: 0.270"
Inner Diameter: 0.115"
Nominal Thickness: 0.019" (min 0.015" – max 0.019")
Packaging: Bulk

Military grade washers have superior standards for material and construction.

410 Stainless Steel is commonly used when a harder material is required.