This LUBRINOX® hex nut is an A4 stainless steel fastener manufactured to DIN 934 standards. Featuring metric threading, it's engineered to prevent thread galling (cold welding)—a common issue with standard stainless steel fasteners. It has a strength class of 70, corresponding to a minimum tensile strength of 700 MPa. Please note: sizes with a diameter larger than M20 have a minimum strength class of 50.