This standard specifies the basic dimensions of small threads whose tooth type conforms to GB/T15054.1, and whose diameter and pitch conform to GB/T15054.2. This standard applies to small threads for general purposes with a nominal diameter ranging from 0.3 to 1.4 mm.
GB/T 15054.3-1994 history
2018GB/T 15054.1-2018 Miniature screw threads.Part 1:Profiles, general plan and basic dimensions
GB/T 15054.3-1994 Miniature screw threads.Basic dimensions was changed to GB/T 15054.1-2018 Miniature screw threads.Part 1:Profiles, general plan and basic dimensions.