1.Name:DIN557 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, JIS, AS,BS, EN, SAE,ASTM3.GradeGr ... :2008What else of nuts we can offer? 1.NameHex nut, Coupling nut, Nylon lock nut, Spring lock nut, Square nut,Wing nut ...