AS 3501-1987

Specifies thread profile and provides information on designation, thread classes, deviations and gauging. Limits of size for both coarse pitch series (BSW) and fine pitch series (BSF), together with associated tolerances, are given. It also covers screw gauges and associated setting plugs, and plain plug and calliper gauges, and includes information on types of gauges, gauge deviations and tolerances, materials and hardness, general gauge design requirements, marking, and general notes on the inspection of screw threads. Appendices give information on special threads, pitch diameter of pitch and flank angle errors, and notes on screw thread verification.

This Standard specifies requirements (in inch units) for parallel screw threads, having the Whitworth thread form, together with associated gauges and gauging practices, in the diameter size range 1/8inch to 6 inches inclusive.The Standard gives information on designation, thread classes, deviations, tolerances, and gauging.Appendices give the basis of the tabulated values, pitch diameter equivalents of pitch and flank angle errors, details of some less frequently used threads, and notes on screw thread verification.

First published as AS B46-1929 (endorsement of BS 84:1918).
AS B47 first published 1929 (endorsement of BS 92:1919).
AS B46-1929 and AS B47-1929 revised, amalgamated and issued as AS B47-1940 (endorsement of BS 84:1940).
AS B121, Part 2 first published 1953 (endorsement of BS 919: Part 2: 1952).
AS B47 third edition 1958 (endorsement of BS 84:1956).
AS B121, Part 2-1953 withdrawn August 1978.
AS B47-1958 revised, and amalgamated with part of AS B121, Part 2-1953 and redesignated as AS 3501-1987.