... , Rice character type, One Way etc.MaterialCarbon steel, stainless steel, SS-304, SS-302, Aluminum, Brass, Bronze, medium carbon alloy steel etc ... .512.814.417.1s810131516182127 STEEL HEXAGON SOCKET HEAD BOLTS DIN912ATANDARD:DIN912 /ISO4762SIZE:M3--M24GRADE:8.8,10.9,12.9FINISHED:ZINC ... ,BLACK OXIDE,HDG,PLAIN,NICKLEPACKING:SMALL BOX head cap screw din912