Relates to dies and die-nuts for cutting inch series screw threads of the following types: UNC, thread class 2A, size range 1-64 to 2-3/4-4; UNF, thread class 2A, size range 0-80 to 1¿¿ to 12; BSW, thread class medium, size range 1/8-40 to 2-3/4-3¿¿; BSF, thread class medium, size range 3/16-32 to 2-7; BA, thread class normal, size range No 14 to No 0. Covers terms and definitions, materials and properties, dimensions and tolerances together with testing and marking requirements.
