GB/T 5357-2023 English PDF (GBT5357-2023)

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GB/T 5357-2023: Keys for hexalobular socket screws
GB/T 5357-2023
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 25.140.30
CCS J 47
Replacing GB/T 5357-1998
Keys for hexalobular socket screws
内六角花形扳手
ISSUED ON: AUGUST 6, 2023
IMPLEMENTED ON: MARCH 1, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Product classification and marking ... 5
5 Technical requirements ... 6
6 Test steps ... 10
7 Inspection rules ... 13
8 Marking, packaging, transportation, and storage ... 13
Appendix A (normative) Special gauge for inspection of flower shape
dimensions of the key's working part ... 14
Appendix B (normative) Torque test block ... 16
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents.
This document replaces GB/T 5357-1998 Hexagon spline wrenches. Compared with
GB/T 5357-1998, in addition to structural adjustments and editorial changes, the main
technical changes are as follows:
a) Product classification is added (see 4.1);
b) Product marking is changed (see 4.2; see 3.2.3 of the 1998 edition);
c) Material requirements and test methods are added (see 5.1 and 6.1);
d) Product dimensions are changed (see 5.2; see 3.2 of the 1998 edition);
e) Surface quality is changed (see 5.3; see 4.4 and 4.5 of the 1998 edition);
f) The hardness is changed (see 5.4; see 4.6 of the 1998 edition);
g) The torque is changed (see 5.5; see 4.6 of the 1998 edition);
h) The test method is changed (see Chapter 6; see Chapter 5 of the 1998 edition);
i) Inspection rules are changed (see Chapter 7; see Chapter 6 of the 1998 edition);
j) The marking, packaging, transportation, and storage are changed (see Chapter
8; see Chapter 7 of the 1998 edition);
k) The special gauge for inspection of flower shape dimension is changed (see
Appendix A; see Appendix A of the 1998 edition);
l) The torque test block is changed (see Appendix B; see Appendix B of the 1998
edition);
Please note that some content in this document may be subject to patents. The issuing
agency of this document assumes no responsibility for identifying patents.
This document was proposed by China National Light Industry Council.
This document shall be under the jurisdiction of the National Technical Committee on
Hardware Products of Standardization Administration of China (SAC/TC174).
Drafting organizations of this document: Jiande Yuanfeng Tool Co., Ltd., Zhejiang
Rongsheng Industrial Co., Ltd., Cangzhou De'an Special Explosion-proof Tools
Keys for hexalobular socket screws
1 Scope
This document specifies the product classification and marking, technical requirements,
test methods, inspection rules, markings, packaging, transportation, and storage of keys
for hexalobular socket screws, and describes the corresponding test methods.
This document applies to hexalobular keys (hereinafter referred to as "keys") for
tightening hexalobular socket screws and bolts.
2 Normative references
The following documents contain the provisions which, through normative reference in
this document, constitute the essential provisions of this document. For the dated
referenced documents, only the versions with the indicated dates are applicable to this
document; for the undated referenced documents, only the latest version (including all
the amendments) is applicable to this document.
GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1: Test method
GB/T 1299 Tool and mould steels
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling
schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3077 Alloy structure steels
GB/T 5305 Packaging, marking, transportation and storage of hand tools
GB/T 6060.2 Roughness comparison specimens - Ground, turned, bored, milled,
shaped and planed
3 Terms and definitions
There are no terms or definitions that need to be defined in this document.
4 Product classification and marking
4.1 Product classification