NUT,BARREL NUT,CAP NUT 1.ISO,ANSI,JIS,DIN,BS& non- ... ,6.8,8.8,9.8.... NUT,BARREL NUT,CAP NUT A good non-standard fastenerS manufacturer for your better ... drywall screw;Type "M","UNC","UNF","BSW"threads for Machine threads.Head typesHexagon head,Mushroom head,Pan head,Countersunk head ... in most of places such as drywall,concrete,chipboard,machine,wood...2) Main export market:North America,South America ...