BSI - BS 949-4
Screwing Taps - Part 4: Metric Ground Thread Taps: Manufacturing Tolerances
|Publication Date:||29 June 1990|
|ICS Code (Taps and threading dies):||25.100.50|
Manufacturing tolerances on the threaded portion of taps for producing ISO metric threads of tolerance classes 4H to 8H and 4G to 6G. Valid for short taps specified in ISO/R 529 as well as any other kind of ground thread taps with the same diameters and pitches.