Specification for black cup and countersunk bolts and nuts.
STANDARD published on 17.4.1947
Designation standards: BS 325:1947
Publication date standards: 17.4.1947
The number of pages: 16
Approximate weight : 48 g (0.11 lbs)
Country: British technical standard
Category: Technical standards BS
Nominal sizes 1 in to 1 in. Dimensions for cup head bolts with square, oval and nibbed shanks, and countersunk headed bolts with square and nibbed shanks for use on steel work and wood work; square and hexagon nuts. Lengths of thread and their tolerances, form of end of bolt shank, quality of steel. Status: Confirmed Replaced by: Confirmed