Bolt Size Thread Threads Length Grade Finish Weight
0.3750 (3/8) Partial Plain Finish 0.0130
Finish Plain Finish
Weight 0.0130

Earnest’s USS Hardened Washers are otherwise known as Wide Heat Treated Washers, Wide Through Hardened Washers, and Wide Hardened Washers. The USS Hardened Washers are through hardened for Grade 8 or better applications preventing imbedding or distortion to the washer and material being clamped. Without washers, bolts and screws can lose their clamping load if they imbed into the clamping material. The washer provides a smooth level and wide protective bearing surface to tighten nuts and bolts.

USS Hardened Washer – Through Hardened

  • Large outside diameter prevents imbedding or distortion and protects clamping material
  • Through hardened for superior strength and resistance to bending
  • To get the best strength of bolt and nut, use washers
  • Smooth, level bearing surface to fasten bolt and nut
  • Rockwell hardness of 38/45
  • Corresponds to a Grade 8 or better applications
  • Sizes range from 1/4 to 1 1/2
  • Meets ASME B18.22.1 Type A Wide standard

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