BS 4183:1967

With ISO metric screw threads to BS 3643, 1 mm to 20 mm diameter. Dimensions, tolerances, mechanical requirements for countersunk, raised countersunk, pan and cheese head screws with slotted heads, and countersunk, raised countersunk and pan head screws with recessed heads. Dimensions, tolerances, general requirements for square and hexagon machine screw nuts (pressed type). Checking recess penetration, dimensioning of 90° countersunk heads, standard sizes. See BS 1981, BS 3692.

Cross References:
BS 21
BS 57
BS 350
BS 450
BS 1580
BS 1981
BS 2827
BS 3155
BS 3382
BS 3643:Part 1
BS 3643:Part 2
BS 3692
PD 5686
ISO/R 7
ISO/DR 949


Replaced by BS EN ISO 7045:1994.

Incorporates the following:
AMD 1742 published 15 May 1975
AMD 572 published 15 August 1970
AMD 8550 published 15 May 1995