BS 949-2:1979

Заменен

Screwing taps, Taps for Unified threads (and for the obsolescent threads of Whitworth and BA forms) — 49 стр.

Заменен на

BS 949-5:1990

ICS

25.100.50 Taps and threading dies / Метчики, резьбонарезные плашки

01.040.25 Manufacturing engineering (Vocabularies) / Машиностроение (Словари)