Applies to ferrous and non-ferrous cotter pins in diameters from 1 to 13 mm and lengths from 4 to 125 mm, for general engineering purposes. Shape, dimensions, properties and finish are specified, and recommendations on gauging are included. Guidance on the use of the split cotter pins with ISO metric bolts, screws and clevis pins is given in an appendix, and requirements for humpback split cotter pins used as locking devices for insulated and conductor fittings specified in AS 1154.2, are also given. For inch series see AS B175.