Split Lock Washer， 18-8 Stainless Steel， 5/16" Bolt Size， 0.3170" ID， 0.5830" OD， 0.0780" Thick， Pack Of 100</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Lock Washers ensure a tight assembly</li><li>Stainless Steel is suitable where formability and cost are important considerations</li><li>Size Name corresponds to matching screw or bolt size</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41FMzDowIhL.jpg' noproxy></br>