<table border="1" cellspacing="0" cellpadding="8"><tbody><tr><td>Standard</td><td>GBT 9074.1-1988</td><td>Compatible Screw Size</td><td>M6,M8,M10,M12</td></tr><tr><td>material</td><td>Red copper</td><td>Type</td><td>Flat Washer</td></tr><tr><td>Surface Treatment</td><td>Intrinsic nature</td><td>application</td><td>Round fastener</td></tr><tr><td>style</td><td>Flat</td><td>finish</td><td>Intrinsic nature</td></tr></tbody></table>