Coupling Fasteners,Connecting 1.ISO,ANSI,CE,DIN,BS& non-standard fastener supply ... ..... Coupling Fasteners,Connecting Fasteners,Aluminum Fasteners. 1.What’s the specification of our Products ? MaterialCarbon steel,Stainless steel,Alloy steel,Copper,Aluminum are available ... SS201,202,302,304,316...copper is shiny brass , pure copper,such as H62,H65,H68...Aluminum is good Aluminum.Meanwhile,we can use ...