BS 1769:1951
Specification. Unified black hexagon bolts, screws, nuts (UNC & UNF threads). Heavy series

Standard No.

BS 1769:1951

Release Date

1951

Published By

British Standards Institution (BSI)

Status

Be replaced

Replace By

BS 3410:1961

BS 1769:1951(1999)

Latest

BS 1769:1951(1999)

Scope

Dimensions, general requirements for sizes $9H in to 2 in. Dimensions of bolts, screws, ordinary nuts, lock nuts, slotted nuts, bolts faced under the head and machined on shank, machined nuts. Formulae for calculation of dimensions for bolts, screw heads, nuts in intermediate sizes, and sizes larger than 2 in.

BS 1769:1951 history

• 0000 BS 1769:1951(1999)
• 1961 BS 3410:1961 Specification for metal washers for general engineering purposes
• 1951 BS 1769:1951 Specification. Unified black hexagon bolts, screws, nuts (UNC & UNF threads). Heavy series