BS 978-2:1952 Specification for fine pitch gears - Cycloidal type gears
BS 978-3:1952 Specification for fine pitch gears - Bevel gears
BS 46-3:1951 Keys and keyways and taper pins - Specification for solid and split taper pins for general engineering purposes
BS 1802:1951 (R2013) Specification for steel spring washers general engineering and automobile purposes partTitleEN sectionTitleEN
BS 1769:1951 Specification. Unified black hexagon bolts, screws, nuts (UNC & UNF threads). Heavy series
BS G 133:1951 Specification for electro-magnetic indicators for extra low voltage aircraft systems
BS 1734:1951 Specification for micrometer heads
BS 1782:1951 Specification for couplings for suction and delivery hose (1$9H in. to 8 in. nominal sizes) other than fire hose couplings
BS 57:1951 (R2013) Specification. B.A. screws bolts and nuts partTitleEN sectionTitleEN
BS 1728-1:1951 (R2016) Methods for the analysis of aluminium and alloys partTitleEN sectionTitleEN
BS SP 28 and 29:1951 Specifications for solid taper pins for aeronautical purposes - Specifications for solid taper pins for aeronautical purposes
BS SP 31 and 32:1951 Specifications for split taper pins for aeronautical purposes