Standard
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AS/NZS 2451:1998
[Current]Bolts, screws and nuts with British Standard Whitworth threads (rationalized series)
Specifies the dimensions for bolts and screws with British Standard Whitworth threads in diameters from ¼ in to 6 in, and the material requirements for steel bolts, screws and nuts for general use.
Published: 05/02/1998
Pages: 22
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 REFERENCED DOCUMENTS
1.3 DEFINITIONS
1.4 MARKING
1.5 DESIGNATION
2 BOLTS AND SCREWS
2.1 SCOPE OF SECTION
2.2 METHOD OF MANUFACTURE
2.3 SHAPE, DIMENSIONS AND FINISH
2.3.1 General
2.3.2 Tolerance on length of hexagon bolts and screws
2.3.3 Ends of hexagon bolts and screws
2.3.4 Screw threads
2.3.4.1 General
2.3.4.2 Tolerances
2.3.4.3 Thread length
2.3.5 Squareness, concentricity and symmetry of hexagon bolts and screws
2.3.5.1 Squareness of head
2.3.5.2 Concentricity of shank to screw thread
2.3.5.3 Symmetry of head to shank
2.3.6 Heads of hexagon bolts and screws
2.3.7 Shank
2.3.7.1 Diameter
2.3.7.2 Bolts with split pin holes
2.3.7.3 Underhead fillet
2.3.7.4 Straightness
2.3.8 Finish
2.3.8.1 General
2.3.8.2 Normal finish
2.2.8.3 Other finishes
2.4 MATERIALS AND MECHANICAL PROPERTIES OF STEEL BOLTS AND SCREWS
2.4.1 Material
2.4.2 Mechanical properties
2.5 TESTING OF MECHANICAL PROPERTIES OF STEEL HEXAGON BOLTS AND SCREWS
3 HEXAGON NUTS
3.1 SCOPE OF SECTION
3.2 METHOD OF MANUFACTURE
3.3 SHAPE AND DIMENSIONS
3.3.1 General
3.3.2 Screw threads
3.3.2.1 Form
3.3.2.2 Tolerances
3.3.3 Chamfering
3.3.4 Countersinking
3.4 SQUARENESS OF THREADS TO BEARING FACE(S)
3.5 FINISH
3.5.1 General
3.5.2 Normal finish
3.5.3 Other finishes
3.6 MATERIALS AND MECHANICAL PROPERTIES OF STEEL NUTS
3.6.1 Material
3.6.2 Mechanical properties
APPENDIX A
Cited references in this standard
[Withdrawn]
ISO system of limits and fits, Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts
[Current]
Parallel screw threads of whitworth form (BSW and BSF) and associated gauges and gauging practice
[Current]
Mechanical properties of fasteners made of carbon steel and alloy steel, Part 2: Nuts with specified property classes — Coarse thread and fine pitch thread
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