This British Standard specifies the materials, dimensions, finish and inspection requirements for cadmium plated steel bolts with countersunk heads and Unified threads for aircraft use.This British Standard specifies the materials, dimensions, finish and inspection requirements for cadmium plated steel bolts with countersunk heads and Unified threads for aircraft use.
BS A 232:1968 history
1968BS A 232:1968 Specification for 100 ° countersunk head steel bolts (160 000 lbf/in2 (110 hbar) with Torq-set recesses)