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GB/T 42850-20231275MPa MJ thread bolt (English PDF)

1275MPaMJ螺纹螺栓

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 6, 2023

Implementation date

March 1, 2024

Scope

GB/T 42850-2023 is the English-translated version of 1275MPaMJ螺纹螺栓.

This document specifies the construction, the dimensions and the technical requirements of MJ thread bolts of 1275 MPa strength grade. The document applies to the design, manufacture and acceptance of those bolts.

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Document preview — GB/T 42850-2023

National Standard of the People's Republic of China

ICS: 49.030.20
Classification: V 20

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative reference documents
3 Terms and Definitions
4 General requirements
4.1 Structure and dimensions
4.2 Technical requirements
4.3 Mark
Appendix A (Normative) Technical Conditions

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

1 Scope

This document specifies the structure, dimensions and technical requirements for 1275MPaMJ threaded bolts (hereinafter referred to as bolts).

This document applies to the design, manufacturing and acceptance of 1275MPaMJ threaded bolts.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 90.2 Fastener marking and packaging

GB/T 228.1 Tensile testing of metallic materials Part 1: Room temperature test methods

GB/T 230.1 Rockwell hardness test of metallic materials Part 1: Test methods

GB 5749 Hygienic Standards for Drinking Water

GB/T 6394 Method for determination of average grain size of metals

GB/T 13911 Metal plating and chemical treatment marking methods HB/Z83 stainless steel pickling and passivation treatment process

HB5800 General tolerances HB5936 component marking

HB6702 GH4169 alloy rod for WZ8 series

ISO 3353-1 Aerospace threads - Part 1: Rolled external threads (Aerospace-Leadandrunout)

ISO 5855-2 Aerospace MJ threads Part 2: Limit dimensions of bolts and nuts (Aerospace-MJthreads- ISO 7913 Aerospace-Boltsandscrews,metric- 3 Terms and definitions There are no terms or definitions to be defined in this document.

4 General requirements

4.1 Structure and dimensions

The structure of the bolt is shown in Figure 1, the dimensions are shown in Tables 1 and 2, and the theoretical weight is shown in Table 3.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 3353-1 · ISO 5855-2

Similar standards

GB/T 44562-2024|GB/T 44563-2024|GB/T 43369-2023

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