Small Parts 10WSAEBPK Steel Flat Washer, Black Oxide Finish, ASME B18.22.1, No. 10 Screw Size, 7/32" ID, 1/2" OD, 0.049" Thick (Pack of 100) Description The steel flat washer has a black oxide finish and meets American Society of Mechanical Engineers ASME B18.22.1 specifications. The flat washer provides a bearing surface for fastener load distribution or is used as a spacer between components. Steel is often used in applications where strength is the primary consideration. The black oxide finish offers mild corrosion resistance and lubricity.Washers distribute the load of a fastener across a surface and can also be used as spacers, springs, shims, or locking devices. Several different washer styles fit a variety of application and installation requirements. The most common style is a flat washer. More specialized washers provide additional benefits. A cup washer, for example, helps protect fasteners from electrical currents, while a lock washer offers additional security in an assembled workpiece. Features: Flat washer provides a bearing surface for fastener load distribution or acts as a spacer Steel is often used in applications where strength is the primary consideration Black oxide finish offers mild corrosion resistance and lubricity Meets ASME B18.22.1 specifications Product Details: Material: Steel Outside Diameter: 0.5 Inches Washer Type: Flat Exterior Finish: Black Oxide Fastener Size: M10 Package Dimensions ‏ : ‎ 5 x 1.5 x 0.5 inches; 0.01 Ounces Item model number ‏ : ‎ 10WSAEBPK Date First Available ‏ : ‎ October 31, 2012 Manufacturer ‏ : ‎ Small Parts Country of Origin ‏ : ‎ China Best Sellers Rank: #44,372 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #266 in Flat Washers #266 in Flat Washers Customer Reviews: 4.5 4.5 out of 5 stars 265 ratings