5/16" USS FLAT WASHER - GRADE 5 ZINC

5/16" USS Flat Washer - Grade 5 Zinc

(Priced per each / Pkg Qty = 100 per/box)

Flat washers are used to increase the bearing surface of a nut or fastener's head thus spreading the clamping force over a larger area. They can be useful when working with soft materials and oversized or irregular shaped holes. USS flat washers offer a looser screw fit, are thicker and have a larger outside diameter (OD) than comparably sized SAE washers. SAE flat washers offer a tighter screw fit, are thinner and have a smaller outside diameter (OD) than comparably sized USS washers.