Materials, dimensions and tolerances for slotted and recessed screws with countersunk, pan, raised cheese and raised countersunk heads and plain slotted hexagon head screws. Overall diameter range No. 0 to ¾ in but varies according to head style. Metric slot widths included as an appendix.
BS 1981:1972
Original price was: $264.16.$132.00Current price is: $132.00.
Specification for Unified machine screws and machine screw nuts
BSI Group , 07/31/1972
