Flat Washers USS Thru Hardened Yellow Zinc - American Made

Yellow Zinc Flat Washers - USA Made | USS

Thru Hardened Yellow Zinc Flat Washers - USS Sizes


  • Grade 8 flat washers in USS are measured in Inch sizes
  • Made of through hardened Grade 8 steel with a yellow zinc plating
  • Used to provide ease of movement for spinning parts, or when the hole holding the fastener assembly is larger than the finishing nut
  • Check below to see our size chart for inner and outer diameter and washer thickness
  • IFI Tolerances Apply
  • Washer Thickness may very +/- .007 depending on production run.
  • REACH and RoHS Compliant
  • USA MADE

Flat Washer Sizes Inner Diameter (ID) Outer Diameter (OD) Washer Thickness
1/4" 0.312" 0.734" 0.065"
5/16" 0.375" 7/8" 0.084"
3/8" 0.438" 1" 0.084"
7/16" 0.500" 1-1/4" 0.084"
1/2" 0.562" 1-3/8" 0.109"
9/16" 0.625" 1.469" 0.109"
5/8" 0.688" 1-3/4" 0.131"
3/4" 0.812" 2" 0.150"
7/8" 0.938" 2-1/4" 0.164"
1" 1.062" 2-1/2" 0.164"
1-1/8" 1.25" 2-3/4" 0.164"
1-1/4" 1.375" 3" 0.164"
1-1/2" 1.625" 3-1/2" 0.183"
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