ISO 21670: 2003 Hexagon weld nuts with flange

The International Organization for Standardization (ISO). First edition, 2003-10-01. 10 p. This International Standard specifies characteristics for hexagon weld nuts with flange, with sizes M5 to M16 (coarse thread) and M12 to M16 (fine thread), of product grade A.
Weld nuts conforming to this International Standard are suitable for use with bolts of property classes up to 10.9 in accordance with ISO 898-1.