BS 4300-12(1969) : 1969

Co-operating organizations
Foreword
Specification
Scope
1 General requirements
1.1 General
1.2 Definitions
1.3 Freedom from defects
1.4 Chemical composition
1.5 Condition
1.6 Sizes and tolerances
1.7 Selection of test samples
1.8 Mechanical tests
1.9 Retests
1.10 Certificate of compliance
1.11 Inspection
1.12 Independent test
1.13 Facilities for testing
1.14 The rounding of numbers rule
2 Specific requirements
2.1 Chemical composition
2.2 Mechanical properties
Appendix
A Standard sizes of material
Tables
1 Tolerances on diameter and length of round bar
      intended for use on automatic lathes
2 Tolerances on width across flats of hexagonal bars
      for nuts and bolts
3 Tolerances on length
4 Tolerances on width and diameter of bars and
      regular sections
5 Tolerances on thickness of bars and regular
      sections
6 Tolerances on open ends of channels and I-beams
7 Angular tolerances for extruded sections
8 Normal radii for corners
9 Tolerances on wall thickness of extruded round
      tube
10 Tolerances on outside diameter of extruded round
      tube
11 Tolerances on width or width across flats of
      hollow sections
12 Tolerances on thickness of hollow sections
13 Tolerances on straightness for extruded bar,
      regular sections and extruded round tube
14 Tolerances on twist for extruded solid and hollow
      sections

Concerns bar, extruded round tube and sections.