GB/T 42851-20231517MPa MJ thread bolt (English PDF)

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 1517MPaMJ threaded bolts (hereinafter referred to as bolts).

This document applies to the design, manufacturing and acceptance of MJ threaded bolts with a strength level of 1517MPa.

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

GB/T 2828.1 Enumeration sampling inspection procedures Part 1: Batch-by-batch inspection sampling plan retrieved by acceptance quality limit (AQL)

GB/T 20878 Stainless steel and heat-resistant steel grades and chemical compositions HB/Z83 stainless steel pickling passivation treatment process

HB5800 General tolerances HB5936 component marking

ISO 3353-1 Aerospace lead threads Part 1: Rolled external threads (Aerospace-Lead and runout

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

4 General requirements