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BS EN ISO 898-2:2022 - TC Tracked Changes. Fasteners — Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with specified property classes, 2022
- National foreword [Go to Page]
- This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.
- Contractual and legal considerations
- Compliance with a British Standard cannot confer immunity from legal obligations.
- ForewordEuropean foreword [Go to Page]
- Endorsement notice
- Foreword
- Introduction
- Fasteners — Mechanical properties of fasteners made of carbon steel and alloy steel —
- Nuts with specified property classes — Coarse thread and fine pitch thread [Go to Page]
- 1 Scope [Go to Page]
- WARNING — Nuts conforming to the requirements of this document are tested at the ambient temperature range of 10 C to 35 C and are used in applications ranging from –50 C to +150 C; however, these nuts are also used outside this range and up to +3...
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- 4.2.1 General
- 4.2.2 Regular nuts (style 1) and high nuts (style 2)
- 4.2.3 Thin nuts (style 0)
- Table 1 — Ranges of nominal diameters in relation to nut style and property class
- 5.1 Nut styles
- 5.2 Property classes [Go to Page]
- 5.2.1 Regular nuts (style 1) and high nuts (style 2)
- 5.2.2 Thin nuts (style 0)
- 56 Design of bolt and nut assemblies [Go to Page]
- Table 2 — Combination of regular nuts (style 1) and high nuts (style 2) with bolt, screw, stud property classes
- 6 Materials [Go to Page]
- Table 3 — Steels
- 7 Material, heat treatment, chemical composition and steel microstructure [Go to Page]
- 7.1 General
- 7.2 Heat treatment
- 7.3 Chemical composition
- 7.4 Steel microstructure [Go to Page]
- 7.4.1 Non‑quenched and tempered nuts
- 7.4.2 Quenched and tempered nuts
- 7 Mechanical properties [Go to Page]
- Table 4 — Proof load values for nuts with coarse thread
- Table 5 — Proof load values for nuts with fine pitch thread
- Table 6 — Hardness properties for nuts with coarse thread
- Table 7 — Hardness properties for nuts with fine pitch thread
- 8 Mechanical and physical properties [Go to Page]
- 8.1 General
- 8.2 Proof load
- 8.3 Hardness
- 8.4 Surface integrity
- 89 Inspection [Go to Page]
- 8.19.1 Manufacturer's inspection
- 8.29.2 Supplier's inspection
- 8.39.3 Purchaser's inspection
- 9.4 Delivery of test results
- 910 Test methods [Go to Page]
- 9.110.1 Proof load test
- 9.1.110.1.1 General
- 9.1.210.1.2 Applicability
- 9.1.310.1.3 Apparatus
- 9.1.410.1.4 Testing device [Go to Page]
- Figure 1 — Axial tensile test
- Table 8 — Hole diameter for the grip
- Dimensions in millimetres
- 9.1.510.1.5 Test procedure
- 9.1.610.1.6 Test results and requirements
- 9.1.7 Requirements
- 9.210.2 Hardness testtests
- 9.2.1 Applicability [Go to Page]
- 9.2.2 Test methods
- 9.2.3 Test procedures
- 9.2.3.1 Test load for hardness determination
- 9.2.3.2 Hardness determined on a surface
- 9.2.3.3 Hardness determined on a longitudinal section
- 9.2.4 Requirements
- 9.2.4.1 Quenched and tempered nuts
- 9.2.4.2 Non-quenched and tempered nuts
- 10.2.1 General
- Table 12 — Summary of hardness requirements
- 10.2.2 Applicability
- 10.2.3 Test methods
- 10.2.4 Test procedures for routine inspection
- a) Hardness determined on the bearing surface
- b) Hardness determined on the transverse section
- Figure 4 — Hardness determination on the transverse section
- 10.2.5 Hardness determined in the thread
- Table 13 — Selection of appropriate test force for Vickers hardness test
- 10.2.6 Hardness determined in the core
- Figure 6 — Hardness determination in the core
- 10.2.7 Uniformity of hardness for quenched and tempered nuts (QT)
- 10.2.8 Requirements for non‑quenched and tempered nuts (NQT)
- 10.2.9 Requirements for quenched and tempered nuts (QT)
- 10.3 Steel microstructure [Go to Page]
- 10.3.1 General
- 10.3.2 Applicability
- 10.3.3 Test method
- 10.3.4 Test results and requirements
- 10.4 Retempering test [Go to Page]
- 10.4.1 General
- 10.4.2 Test procedure
- 10.4.3 Test results and requirements
- 10.5 Surface discontinuity inspection
- 10 Marking [Go to Page]
- 10.1 General
- 10.2 Identification mark of the manufacturer
- 10.3 Marking of property classes [Go to Page]
- 10.3.1 General
- 10.3.2 Regular nuts (style 1) and high nuts (style 2)
- Table 9 — Marking symbols of property classes for regular nuts (style 1) and high nuts (style 2)
- 10.3.3 Thin nuts (style 0)
- Table 10 — Marking symbols of property classes for thin nuts (style 0)
- 10.4.1 Hexagon nuts
- Figure 5 — Examples of marking with clock-face system (alternative marking)
- 10.4.2 Other type of nuts
- Figure 6 — Marking of left-hand thread
- Figure 7 — Alternative marking of left-hand thread
- 11 Marking and labelling [Go to Page]
- 11.1 General requirements
- 11.2 Property class marking symbols for nuts with full loadability
- 11.3 Property class marking symbols for nuts with reduced loadability [Go to Page]
- Table 15 — Property class marking symbols for nuts with reduced loadability (e.g. thin nuts)
- 11.4 Manufacturer’s identification mark
- 11.5 Nut marking [Go to Page]
- Figure 7 — Examples of marking for hexagon nuts with full loadability
- Figure 9 — Examples of marking for hexagon nuts with reduced loadability
- Figure 10 — Examples of marking for left‑hand thread
- 11.6 Marking of the packages (labelling) [Go to Page]
- Table A.1 — Minimum heights of hexagon nuts
- Table A.2 — Minimum Vickers hardness suggested for regular nuts (style 1) with D < M5
- Annex A
- Thread dimensions of the test mandrel [Go to Page]
- Table A.1 — Thread dimensions of the proof load test mandrel — Coarse pitch thread
- Table A.2 — Thread dimensions of the proof load test mandrel — Fine pitch thread [Go to Page]
- Table B.1 — Thread dimensions of the proof load test mandrel — Coarse thread
- Table B.2 — Thread dimensions of the proof load test mandrel — Fine pitch thread
- Annex B
- Design principles for nuts [Go to Page]
- B.1 Basic design principles for nuts [Go to Page]
- WARNING — Nuts on the market showing vertical bars on each side of the property class symbol (e.g. |8| ) do not fulfil the requirements of this document.
- Table B.1 — Minimum height of standard hexagon nuts (without flange and without prevailing torque feature)
- B.2 Nuts with diameters D < 5 mm and D > 39 mm
- Annex C
- Stress under proof load, SP [Go to Page]
- Table C.1 — Stress under proof load, SP — Coarse pitch thread
- Bibliography
- 30464638Tracked_Changes_Cover_Markup_new.pdf [Go to Page]
- compares BS EN ISO 898-2:2022 [Go to Page]
- TRACKED CHANGES
- Text example 1 — indicates added text (in green)
- 30401616.pdf [Go to Page]
- National foreword
- European foreword
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols
- 5 Designation systems [Go to Page]
- 5.1 Nut styles
- 5.2 Property classes [Go to Page]
- 5.2.1 Regular nuts (style 1) and high nuts (style 2)
- 5.2.2 Thin nuts (style 0)
- 6 Design of bolt and nut assemblies
- 7 Material, heat treatment, chemical composition and steel microstructure [Go to Page]
- 7.1 General
- 7.2 Heat treatment
- 7.3 Chemical composition
- 7.4 Steel microstructure [Go to Page]
- 7.4.1 Non-quenched and tempered nuts
- 7.4.2 Quenched and tempered nuts
- 8 Mechanical and physical properties [Go to Page]
- 8.1 General
- 8.2 Proof load
- 8.3 Hardness
- 8.4 Surface integrity
- 9 Inspection [Go to Page]
- 9.1 Manufacturer's inspection
- 9.2 Supplier's inspection
- 9.3 Purchaser's inspection
- 9.4 Delivery of test results
- 10 Test methods [Go to Page]
- 10.1 Proof load test [Go to Page]
- 10.1.1 General
- 10.1.2 Applicability
- 10.1.3 Apparatus
- 10.1.4 Testing device
- 10.1.5 Test procedure
- 10.1.6 Test results and requirements
- 10.2 Hardness tests [Go to Page]
- 10.2.1 General
- 10.2.2 Applicability
- 10.2.3 Test methods
- 10.2.4 Test procedures for routine inspection
- 10.2.5 Hardness determined in the thread
- 10.2.6 Hardness determined in the core
- 10.2.7 Uniformity of hardness for quenched and tempered nuts (QT)
- 10.2.8 Requirements for non-quenched and tempered nuts (NQT)
- 10.2.9 Requirements for quenched and tempered nuts (QT)
- 10.3 Steel microstructure [Go to Page]
- 10.3.1 General
- 10.3.2 Applicability
- 10.3.3 Test method
- 10.3.4 Test results and requirements
- 10.4 Retempering test [Go to Page]
- 10.4.1 General
- 10.4.2 Test procedure
- 10.4.3 Test results and requirements
- 10.5 Surface discontinuity inspection
- 11 Marking and labelling [Go to Page]
- 11.1 General requirements
- 11.2 Property class marking symbols for nuts with full loadability
- 11.3 Property class marking symbols for nuts with reduced loadability
- 11.4 Manufacturer’s identification mark
- 11.5 Nut marking
- 11.6 Marking of the packages (labelling)
- Annex A (normative) Thread dimensions of the test mandrel
- Annex B (informative) Design principles for nuts
- Annex C (informative) Stress under proof load, SP
- Bibliography [Go to Page]
