Relates to parallel screw threads having the British Association (B.A) form of trhead. It covers: basic sizes for B.A. threads, sizes 0 B.A. to 25 B.A.; and limits and tolerances for close and normal classes of bolt, sizes 0 B.A. to 10 B.A.
Specifying Signal Quality for Transmitting and Receiving Data Processing Terminal Equipments Using Serial Data Transmission at the Interface with Non-Synchronous Data Communication Equipment