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2 1/4 USS Flat Washers (ASME B18. 22.1)

USS Flat Washers were among the first known commercial flat washers in the U.S.A. They are characterized as having a loose fit, and have a larger outside diameter than SAE Flat washers. The USS designation was derived from the name “Unified Standard Series.” At the time, coarse threaded bolts were called USS bolts.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
B & K FASTPAUSS Flat WasherSteelPlain2 1/42 1/4 uss flat washer plain b18.22.1109
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B & K FASTPAUSS Flat WasherSteelZinc/Clear2 1/42 1/4 uss flat washers zinc b18.22.1147
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BHAMFLUSS Flat WasherSteelGalvanized2 1/42-1/4 uss flat hdg b18.22.128
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Bostwick INUSS Flat WasherSteelPlain2 1/42-1/4 uss flat washer b18.22.120
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THRDFASTFLUSS Flat WasherSteelPlain2 1/4USS f/w b18.22.1125
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THRDFASTFLUSS Flat WasherSteelGalvanized2 1/4USS f/w hdg b18.22.123
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