AS/NZS 1252:1996
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.
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AS/NZS 1252:1996 HIGH-STRENGTH STEEL BOLTS WITH ASSOCIATED NUTS AND WASHERS FOR STRUCTURAL ENGINEERING
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
1.4.1 Concentricity tolerance
1.4.2 Grip length
1.4.3 May
1.4.4 Nominal length (l)
1.4.5 Shall
1.4.6 Should
1.4.7 Symmetry tolerance
1.4.8 Thread length (b)
1.4.9 Thread runout
1.4.10 Transition diameter
1.4.11 Unthreaded shank length
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
SECTION 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
2.2.5 Thread length
2.2.6 Squareness, concentricity and symmetry
2.2.7 Chamfering and washer facing
2.2.8 Shank
2.2.9 Underhead fillet
2.2.10 Finish
2.3 MATERIALS AND MECHANICAL PROPERTIES
2.4 TEST METHODS
SECTION 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
3.2.3 Chamfering, washer facing and countersinking
3.2.4 Squareness and symmetry
3.2.5 Finish
3.3 MATERIAL AND MECHANICAL PROPERTIES
3.4 TEST METHODS
SECTION 4 FLAT ROUND WASHERS
4.1 SHAPE, DIMENSIONS AND FINISH
4.1.1 Shape and dimensions
4.1.2 Flatness
4.1.3 Finish
4.2 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 - SUGGESTED SAMPLING PLAN FOR MECHANICAL PROPERTIES
TABLE A1
NUMBER OF TEST SPECIMENS
APPENDIX B - RECOMMENDED GAUGE AND METHOD FOR CHECKING THE SQUARENESS OF THE THREAD TO THE FACE OF THE NUT
APPENDIX C - ASSEMBLY TEST FOR COATED FASTENERS
A1 SCOPE
A2 ASSEMBLY
A3 TEST PROCEDURE
APPENDIX D - SQUARE TAPER WASHERS
D1 SCOPE
D2 DIMENSIONS
D3 MATERIAL AND HEAT TREATMENT
D4 FINISH
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AS/NZS 1252:1996 HIGH-STRENGTH STEEL BOLTS WITH ASSOCIATED NUTS AND WASHERS FOR STRUCTURAL ENGINEERING
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
1.4.1 Concentricity tolerance
1.4.2 Grip length
1.4.3 May
1.4.4 Nominal length (l)
1.4.5 Shall
1.4.6 Should
1.4.7 Symmetry tolerance
1.4.8 Thread length (b)
1.4.9 Thread runout
1.4.10 Transition diameter
1.4.11 Unthreaded shank length
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
SECTION 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
2.2.5 Thread length
2.2.6 Squareness, concentricity and symmetry
2.2.7 Chamfering and washer facing
2.2.8 Shank
2.2.9 Underhead fillet
2.2.10 Finish
2.3 MATERIALS AND MECHANICAL PROPERTIES
2.4 TEST METHODS
SECTION 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
3.2.3 Chamfering, washer facing and countersinking
3.2.4 Squareness and symmetry
3.2.5 Finish
3.3 MATERIAL AND MECHANICAL PROPERTIES
3.4 TEST METHODS
SECTION 4 FLAT ROUND WASHERS
4.1 SHAPE, DIMENSIONS AND FINISH
4.1.1 Shape and dimensions
4.1.2 Flatness
4.1.3 Finish
4.2 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 - SUGGESTED SAMPLING PLAN FOR MECHANICAL PROPERTIES
TABLE A1
NUMBER OF TEST SPECIMENS
APPENDIX B - RECOMMENDED GAUGE AND METHOD FOR CHECKING THE SQUARENESS OF THE THREAD TO THE FACE OF THE NUT
APPENDIX C - ASSEMBLY TEST FOR COATED FASTENERS
A1 SCOPE
A2 ASSEMBLY
A3 TEST PROCEDURE
APPENDIX D - SQUARE TAPER WASHERS
D1 SCOPE
D2 DIMENSIONS
D3 MATERIAL AND HEAT TREATMENT
D4 FINISH
Previous versions
AS/NZS 1252:1996
Online Library subscription pricing
The cost of your subscription will depend on which standards you want to access, and how many people in your organisation need to be able to access the Online Library subscription at the same time (concurrent users). During your subscription period, we are also able to make any necessary changes and ensure you are aware of any pricing changes that result. For a quote, contact our Online Library team by emailing onlinelibrary@standards.govt.nz.