ALUMINUM SLEEVE NUT 1.ISO,ANSI,JIS,DIN,BS& non-standard fastener ... .Grade:4.8 ,6.8,8.8,9.8.......... ALUMINUM SLEEVE NUT,ALUMINUM WELD NUT,NUT A good non-standard fastenerS ... ","UNC","UNF","BSW"threads for Machine threads.Head typesHexagon head,Mushroom head,Pan head,Countersunk head,Bugle head,Oval head,Hex ...