1.Name:Flat countersunk head screws 2.Size: M3X10----M16X150 3.Grade:Gr.8.8,10.9 ... ,#1022,#1035,#1045 Specification of our screw: 1.NameFlat countersunk head screws2.StandardDIN, IFI, ISO, JIS, AS,BS, EN, SAE, ... 5.8,8.8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325,A394,A490,A4494. ... else of nuts we can offer?1.NameHex head bolt,Square head bolt,Round head bolt,Hex socket bolt,Carriage bolt, Track bolt ...