Describes nickel and nickel plus chromium plating thicknesses, sampling and other inspection procedures, and methods of thickness determination for components having threads of basic major diameters from 0.060 in to 3/4 in inclusive, specified in the following, BS 84 Parallel screw threads of Whitworth form, BS 93 British Association screw threads with tolerances for sizes 0 B.A. to 16 B.A., BS 811 cycle threads, BS 1580 unified screw threads, BS 2779 fastening threads of BSP sizes, BS 3643 ISO metric screw threads. Including bolts and screws - general purpose, nuts - general purpose.