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M4 USS Flat Washers

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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Buy USS Flat Washers from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
THRDFASTFLUSS Flat WasherSteelPlainM4USS f/w840
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THRDFASTTNUSS Flat WasherSteelPlainM42USS f/w8
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THRDFASTALUSS Flat WasherSteelPlainM4USS f/w139
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