... 4.Material:#1008,#1022,#1035,#1045 Specification of our screw: 1.NameFlat countersunk head screws2.StandardDIN, IFI, ISO, JIS, AS,BS, EN, SAE ... .MaterialCarbon steel(#1035,#1045,40Cr,35CrMo,42CrMo,B7,20Mn2,M20) ,Stainless steel(303,304,304L,316,316L),Brass(H59,H62)6 ... else of nuts we can offer?1.NameHex head bolt,Square head bolt,Round head bolt,Hex socket bolt,Carriage bolt, Track bolt,Flang bolt ...