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1 7/8 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 
GLFOHUSS Flat WasherSteelPlain1 7/81-7/8 uss flat stl pln b18.22.1 () () ()71
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B & K FASTPAUSS Flat WasherSteelPlain1 7/81 7/8 uss flat washers plain b18.22.1242
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General FMIUSS Flat WasherSteelZinc/Yellow1 7/81-7/8 uss hrdnd fw zinc yellow b18.22.1172
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Bostwick INUSS Flat WasherSteelPlain1 7/81-7/8 uss flat washer b18.22.1100
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THRDFASTFLUSS Flat WasherSteelPlain1 7/8USS f/w b18.22.184
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THRDFASTFLUSS Flat WasherSteelGalvanized1 7/8USS f/w hdg b18.22.125
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THRDFASTMSUSS Flat WasherSteelGalvanized1 7/8USS f/w hdg b18.22.134
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THRDFASTMSUSS Flat WasherSteelZinc/Clear1 7/8USS f/w b18.22.19
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