... , wire ropes; stainless steel welding pipe; fastener(nuts, bolts, screws&washers); glass curtain wall fittings(spider, routel, connector)etc., with the standard ofASTM ... ,AISI,DIN,JIS,NFA,BS,GB etc., About the stainless steel products, the steel grade includes 201, 202, 301, 304, 304L, 309,310, 310S ...