... Square Nuts 2.Size: 1/4"-7/8" 3.Grade:Gr.2,5,8,10, 2H, DH, /8/ 4.Material:Carbon steel,Stainless steel ... Specification of our nut: 1.NameDIN557 Square Nuts 2.StandardDIN, IFI, ISO ... BSF, TR, ACME, NPT 5.MaterialCarbon steel(#1035,#1045,40Cr,35CrMo,42CrMo,B7,20Mn2,M20) ... nuts we can offer? 1.NameHex nut, Coupling nut, Nylon lock nut, Spring lock nut, Square ...