1.Standard:DIN,GB,ANSI,ISO 2.Material:carbon steel,stainless steel,steel 3.Grade:A2-A4 4.Color:Based on customer requirements ... Standard:DIN,ANSI,GB,JISMaterial:iron,stainless steel,carbon steel,steelSize:variousStrength:4.6,4.8,5.6,5 ... according to the customers requirementsWe can produce all kinds of screws or according to customers drawing and samples with high quality ...