Plain washers for high-strength structural bolting, hardened and tempered
This International Standard specifies those hardened and tempered circular washers intended for assembly with large series hexagon high-strength structural bolts and nuts of diameters from M12 to M36 inclusive.

Check out other specifications
Conical spring washers for bolt/nut assemblies
Hot rolled products of structural steels — Part 2: Technical delivery conditions for non-alloy structural steels
Hexagon thin slotted nuts and castle nuts with metric coarse and fine pitch thread Product grades A and B
Steel rod, bars and wire for cold heading and cold extrusion Part 2: Technical delivery conditions for steels not intended for heat treatment after cold working – English version of DIN EN 10263-2
Bolts, Screws, Nuts and Similar Threaded and Formed Parts – Technical Conditions of Delivery – Self-Tapping Screws