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AS/NZS 1252:1996
[Available Superseded]High-strength steel bolts with associated nuts and washers for structural engineering
Specifies requirements for high strength steel bolts of property class 8.8 and steel nuts of property class 8 with ISO metric coarse pitch series threads and associated washers in diameters from 16 mm to 36 mm inclusive, mainly intended for use in steel structures.
Published: 05/10/1996
Pages: 23
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
1.5 MARKING (see Figure 1.1)
1.5.1 Bolts
1.5.2 Nuts
1.5.3 Washers
1.6 DESIGNATION
1.6.1 Bolts
1.6.2 Nuts
1.6.3 Washers
2 HIGH-STRENGTH STEEL BOLTS
2.1 METHOD OF MANUFACTURE
2.2 SHAPE, DIMENSIONS AND FINISH
2.2.1 Head
2.2.2 Length
2.2.3 Ends
2.2.4 Screw threads
2.2.4.1 General
2.2.4.2 Tolerances
2.2.5 Thread length (b)
2.2.6 Squareness, concentricity and symmetry
2.2.6.1 Squareness of bearing face
2.2.6.2 Concentricity of shank to screw thread
2.2.6.3 Symmetry of head to shank
2.2.7 Chamfering and washer facing
2.2.8 Shank
2.2.8.1 Diameter
2.2.8.2 Straightness
2.2.9 Underhead fillet
2.2.10 Finish
2.2.10.1 General
2.2.10.2 Surface roughness
2.2.10.3 Surface finish
2.2.10.4 Coatings
2.3 MATERIALS AND MECHANICAL PROPERTIES
2.4 TEST METHODS
3 HIGH-STRENGTH STEEL NUTS
3.1 METHOD OF MANUFACTURE
3.2 SHAPE, DIMENSIONS AND FINISH
3.2.1 General
3.2.2 Screw threads
3.2.2.1 General
3.2.2.2 Tolerances
3.2.3 Chamfering, washer facing and countersinking
3.2.3.1 Chamfering and washer facing
3.2.3.2 Countersinking
3.2.4 Squareness and symmetry
3.2.4.1 Squareness of thread to bearing face(s)
3.2.4.2 Symmetry of hexagon
3.2.5 Finish
3.2.5.1 General
3.2.5.2 Surface roughness
3.2.5.3 Surface finish
3.2.5.4 Coated nuts
3.3 MATERIAL AND MECHANICAL PROPERTIES
3.4 TEST METHODS
4 FLAT ROUND WASHERS
4.1 SHAPE, DIMENSIONS AND FINISH
4.1.1 Shape and dimensions
4.1.2 Flatness
4.1.3 Finish
4.1.3.1 General
4.1.3.2 Surface roughness
4.1.3.3 Surface finish
4.1.3.4 Coatings
4.2 MATERIAL AND HEAT TREATMENT
4.2.1 Material
4.2.2 Heat treatment
4.3 HARDNESS
4.3.1 General
4.3.2 Hardness tests
APPENDIX A
APPENDIX B
APPENDIX C
A1 SCOPE
A2 ASSEMBLY
A3 TEST PROCEDURE
APPENDIX D
D1 SCOPE
D2 DIMENSIONS
D3 MATERIAL AND HEAT TREATMENT
D4 FINISH
Cited references in this standard
SAE J122a
Surface discontinuities on nuts
ISO 6157.1
Fasteners—Surface discontinuities, Part 1: Bolts, screws and studs for general requirements
SAA/SNZ HB18.22
Guidelines for third-party certification and accreditation, Guide 22: Information on manufacturers’ declaration of conformity with standards or other technical specifications
[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
Content history
[Current]
[Current]
[Superseded]
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