... steel ,stainless steel,brassStandardstandard fasteners (GB, DIN, ANSI,JIS AND ) and non-standard.GradeClass 4.8, Class 6.8, Class 8 ... ChinaMarketSouth&north Amrica/Europe/East&South east Asia/ Australia and ect.Contact Purchasing NoticePlease lets know the size, quantity, ... . If it is special and Non-standard products, please supply the Drawing or Photos or Samples to us metal thread screw shaft