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USS Flat Washers , ASTM F1941-10 Fe/Zn

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 
IRFNJUSS Flat WasherSteelASTM F1941-10 Fe/Zn5/16USS flat clr stl zinc iron clear Cr3+ with sealer239
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