GB/T 5357-2023 Keys for hexalobular socket screws
1 Scope
This document specifies product classification and designation, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of keys for hexalobular socket screws.
This document is applicable to keys for hexalobular socket screws (hereinafter referred to as "spanner") used to wrench hexalobular screws and bolts.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute indispensable requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
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
No terms and definitions are listed in this document.
4 Product Classification and Labeling
4.1 Product classification
Spanners are divided into with holes (code: H) and without holes (no code) according to the structure of working part, and divided into three types: standard type (no code), long type (code: L) and extended type (code: XL) according to the long handle types.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Product Classification and Labeling
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation and storage
Annex A (normative) Special gauge for hexalobular size inspection of spanner working part
Annex B (normative) Torque test block
