Check the listing for details. 5/16" stainless steel flat washers Qty 25. Condition: New. Listed at 7.55 USD. 5/16" stainless steel flat washers Qty 25 Flat washers are a thin, flat, circular stamping with a centrally located hole, made from 18-8 austenitic stainless steel. Designed for use with stainless steel screws and nuts in general applications where parts are subject to corrosion. These general purpose commercial standard flat washers are positioned under a nut, head of a screw, or head of a bolt in order to provide a smooth bearing surface and evenly distribute the fastener load over a wider area. General Product Information Nominal Washer Size : 5/16" Inside Diameter : 0.343" Outside Diameter : 0.750" Washer Thickness Minimum : 0.043" Washer Thickness Maximum : 0.057" Quantity of Fasteners in Package : 25 Shipping: All orders placed before 3:30 pm EST Will Ship Same Day Tracking is provided on ALL Orders Priority Mail Shipping service is offered at a discount of only $3.95 UPS Ground UPS Next Day Air is available, Please inquire for pricing Returns : ALL returns are accepted if returned within 60 days. Money Back or exchange guaranteed. NO Restocking Fees. For YOU, we constantly strive to find ways of improving our performance.