BS 811:1950

Действует

Specification for cycle (B.S.C.) threads (formerly known as C.E.I. threads) — 24 стр.

ICS

21.040.30 Special. Including miniature screw threads, pipe threads, etc. / Специальные резьбы. Включая мелкие резьбы, трубные резьбы и т.д.