... scrows are available.such as :Self tapping threads "A","AB", Threads for chipboard screw,wood screw,drywall screw ... ;Type "M","UNC","UNF","BSW"threads for Machine threads.Head typesHexagon head,Mushroom head,Pan head ... -1.27T 5)20 pallets form a 20 GP container . G.W. for a 20 GP container :22 ... . We are a professional manufacturer with more than 20 years experiences in screw,bolt,nut,washer,rivet, ...