Specifies chamfered, 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.
SANS 1700-16-9:2004 history
2004SANS 1700-16-9:2004 Fasteners Part 16: Washers Section 9: Plain washers, chamfered, hardened, and tempered for high-strength structural bolting