Nominal sizes 3/16 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.Cross References:BS 84BS 916BS 1580BS 3643
BS 325:1947
Original price was: $190.00.$95.00Current price is: $95.00.
Specification for black cup and countersunk bolts and nuts
BSI Group , 04/17/1947