Specifies dimensions, material, mechanical properties and marking of steel commercial bolts and screws in diameters M5 to M64, and having coarse pitch series threads. Includes recommended methods of test for mechanical properties. Preferred lengths are indicated. Appendices cover derivation of tolerances, dimensions for sizes over M64, split-pin fasteners, notes on hexagon sizes, a sampling plan for mechanical properties tests, and complete designation of a fastener.