AS 2829-1986

Specifies requirements for British Association (BA) screw threads in sizes 0 BA (6 mm diameter) to 25 BA (0.25 mm diameter) inclusive. It gives information on the screw thread system, including tolerances, deviations, symbols used for the screw thread parameters, and designation, together with requirements for associated gauges and gauging practices used for the verification of the screw threads for sizes from 0 BA to 10 BA inclusive. Appendices give the basis of the tabulated values, notes on the pitch diameter equivalent of pitch and angle errors, and notes on the verification of screw threads.