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GB/T 42180-2022 English PDF

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GB/T 42180-2022: A286 bihexagonal head bolts with long length MJ threads for aerospace
Status: Valid
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GB/T 42180-2022English199 Add to Cart 3 days [Need to translate] A286 bihexagonal head bolts with long length MJ threads for aerospace Valid GB/T 42180-2022

PDF similar to GB/T 42180-2022


Standard similar to GB/T 42180-2022

GB/T 28878.10   GB/T 28878.9   GB/T 42181   GB/T 42179   

Basic data

Standard ID GB/T 42180-2022 (GB/T42180-2022)
Description (Translated English) A286 bihexagonal head bolts with long length MJ threads for aerospace
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard V20
Classification of International Standard 49.030.20
Word Count Estimation 10,194
Date of Issue 2022-12-30
Date of Implementation 2023-04-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 42180-2022: A286 bihexagonal head bolts with long length MJ threads for aerospace

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 49.030.20 CCSV20 National Standards of People's Republic of China A286MJ Long Thread Dodecagon Bolts for Aerospace diametershank, lengthMJthreads, metallicmaterial, coatedoruncoated, Posted on 2022-12-30 2023-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document is modified to adopt ISO 3203.1993 "Aerospace bolts, ordinary twelve angles, normal rod or medium diameter rod, MJ long screw, metal material material, coated or uncoated, strength class less than or equal to 1100MPa size". Compared with ISO 3203.1993, this document has made the following structural adjustments. --- This document adds a "Terms and Definitions" chapter. --- 4.1 of this document corresponds to Chapter 3 in ISO 3203.1993, adding 4.2. The technical differences between this document and ISO 3203.1993 and the reasons are as follows. ---Increase the surface roughness of the bolt (see Figure 1), the roughness is a necessary basis for the manufacture of the bolt, and the surface roughness can be improved Guidance for the manufacture of bolts; --- Changed some dimensioning symbols of bolts (see Figure 1 and Table 1), which is more in line with the domestic habit of dimensioning fasteners; ---Deleted the rod diameter corresponding to the medium diameter rod (see Table 1), which is more in line with the actual use of domestic aerospace dodecagonal bolts; --- Increase the tolerance of the P dimension of the fuse hole position of the head (see Table 1), which can better guide the manufacturing; --- Increase the bolt length table (see Table 2) to better guide the manufacture and selection of bolts; --- Added technical requirements such as bolt materials, heat treatment, surface treatment, threads, marking examples (see 4.2), these technical requirements are bolts An important basis for bolt manufacturing and selection; --- The reference document AMS5853 (see 4.2.1) for bolt materials has been added to guide the acceptance of bolt raw materials; --- Added the reference document HB/Z83 (see 4.2.3) for bolt surface treatment, guiding the implementation of bolt surface passivation process and acceptance; --- Added the reference document HB8367 (see 4.2.6) of the technical specification for bolts, specifying the metallurgical characteristics and mechanical properties of bolts, etc. Technical indicators, as well as acceptance methods, are used to guide the manufacture and acceptance of bolts. The following editorial changes have been made to this document. --- In order to coordinate with existing standards, change the name of the standard to "A286MJ Long Thread Dodecagonal Bolts for Aerospace". Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the National Aircraft Standardization Technical Committee (SAC/TC435). This document is drafted by. China Aviation Comprehensive Technology Research Institute, China Aviation Development Shenyang Engine Research Institute, Guizhou Aerospace Seiko Manufacturing Co., Ltd. Company, China Aviation Industry Standard Parts Manufacturing Co., Ltd. The main drafters of this document. Miao Shengpei, Zheng Dongmei, Yu Shaowei, Zhang Panlin, Li Jiaxiao. A286MJ Long Thread Dodecagon Bolts for Aerospace

1 Scope

This document specifies the structure, dimensions and technology of A286MJ long thread twelve-point bolts (hereinafter referred to as "bolts") for aerospace Require. This document is applicable to the design, manufacture and testing of A286MJ long thread twelve-point bolts for aerospace.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. HB/Z83 stainless steel pickling passivation treatment process HB8367 1100MPa Strength Class A286MJ Threaded Bolts and Screws Specification ISO 3353-1 Aerospace thread leads and finishes - Part 1.Rolled external threads (Aerospace-Lead and runout ISO 4095 Aerospace twelve-point wrenching dimensions metric series (Aerospace-Bihexagonaldrives-Wrenching ISO 5855-2 Aerospace MJ threads Part 2.Limiting dimensions of bolts and nuts (Aerospace-MJthreads- AMS5853 steel, corrosion-resistant and heat-resistant, bar and wire, 15Cr-25.5Ni-1.2Mo-2.1Ti-0.006B-0.30V, consumable electrode melting Chemical, solid solution at 1800℉(982℃), processing strengthened to tensile strength of 160ksi(1103MPa)[Steel,Corrosionandheat-resist-

3 Terms and Definitions

This document does not have terms and definitions that need to be defined.

4 requirements

4.1 Structure and dimensions The structure and size of the bolts shall comply with the regulations in Figure 1, Table 1 and Table 2.

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