This standard specifies the type, basic dimensions, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of hexagon socket wrenches. This standard applies to hexagon socket wrenches for tightening hexagon socket screws. GB/T 5357-1998 Hexagon socket wrenches GB/T5357-1998 Standard download decompression password: www.bzxz.net

GB/T5357—1998
This standard is a revised version of GB5357-85 "Hexagonal wrench". The special gauges for hexagonal dimensions in this standard refer to the provisions recommended in the draft standard of ISO/TC29/SC10N261, and the hexagonal test holes for torque test also adopt the provisions recommended in the draft standard. From the date of implementation, this standard will replace GB5357-85 "Hexagonal wrench". Appendix A and Appendix B of this standard are both informative appendices. This standard was proposed by the Quality Standards Department of China Light Industry Association. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. The drafting units of this standard are: Shanghai Tool Industry Research Institute, Shanghai Changzheng Screwdriver Factory. The main drafters of this standard are: Lu Xialing and Chen Chunli. 286
1 Scope
National Standard of the People's Republic of China
Hexagon spline wrenches
Hexagon spline wrenches
GB/T 5357—1998
Replaces GB5357—85
This standard specifies the type, basic dimensions, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of hexagon spline wrenches.
This standard applies to hexagon spline wrenches (hereinafter referred to as wrenches) for tightening hexagon spline screws. 2
Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T230--91Methods for testing Rockwell hardness of metalsGB/T1298-86Technical conditions for carbon tool steelGB/T1957-80Smooth limit gauges
GB/T2828-87Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches)Packaging, marking, transportation and storage of hand toolsGB/T 5305--85
3 Types and basic dimensions
3.1 The type of hexagon socket wrench is shown in Figure 1. B
Figure 1 Hexagon socket wrench
Approved by the State Administration of Technical Supervision on March 25, 1998 and implemented on January 1, 1999
3.2 Basic dimensions
3.2.1 The basic dimensions of the wrench shall be as specified in Table 1. Code
Basic size
Basic size
The diameter d of the circular cross section of the wrench arm can be rounded to an integer GB/T5357-1998
Basic size
Basic size
2 The long arm L and short arm 1 of the wrench may not be restricted by this standard if there are special needs. Tolerance
3.2.2 The hexagonal flower size of the working part of the wrench (hereinafter referred to as the hexagonal flower size) shall be as specified in Table 2. Table 2 Hexagonal flower size of the working part
Basic size
Limit deviation
Basic size
Limit deviation
Note: The hexagonal flower size listed in the table refers to GB/T2670 "Hexagonal Flower Size". 3.2.3 The marking of the wrench consists of the product name, code, long arm size, short arm size and standard number. Marking example: Hexagonal wrench T3070×24GB/T5357-19983.2.4 The shape and position tolerance of the hexagonal flower are included in the size tolerance zone. 4 Technical requirements
4.1 The verticality tolerance between each end face of the wrench and the axis of its arm shall not exceed 4°. 4.2 The straightness of the wrench arm shall not exceed 0.5mm within the length of 50mm. 4.3 The working part of the wrench and the arm shall be on the same axis and there shall be no obvious offset. 4.4 The wrench needs to be surface treated and its color shall be uniform. 4.5 There shall be no defects such as cracks and scars on the surface of the wrench. 4.6 The hardness and test torque value of the wrench shall comply with the provisions of Table 3. 288
90°±2°40°±5°
GB/T5357-1998
Table 3 Hardness value and test torque valuebZxz.net
Applicable screws
M12～14
After the torque test, the wrench should not have permanent deformation that affects its use. 5 Test method
5.1 The hexagonal flower size shall be inspected according to the special gauge specified in Appendix A. 5.2 The verticality of the end face of the wrench and its arm shall be measured with a universal angle ruler. 5.3 The angle α and radius r of the wrench shall be inspected with a sample. Hardness, HRC
5.4 The straightness of the wrench shall be measured with a knife-shaped ruler and a feeler gauge with a range of 0～50mm. 5.5 The axis deviation of the working part and the arm of the wrench shall be visually inspected. 5.6 The surface quality shall be visually inspected.
5.7 The hardness test shall be carried out in accordance with the provisions of GB/T230. 5.8 The torque test shall be carried out in accordance with the following provisions:
5.8.1 The torque test shall be carried out on a special torque machine. Test torque value. N·m
5.8.2 The meshing depth between the working part of the wrench and the hexagonal test hole (see Appendix B) shall not be less than 70% of the dimension t in Table 1, and the surface hardness of the test hole shall not be less than HRC60.
5.8.3 Insert the working part of the short arm into the test hole, and slowly load the end of the long arm until the value specified in Table 3 is reached. After holding the load for 1 minute, remove the load. The wrench after the test shall meet the requirements of 4.7. 6 Inspection rules
6.1 Products shall be shipped only after passing the inspection and shall be accompanied by a product certificate. 6.2 The acceptance inspection of products shall be carried out in accordance with the provisions of the secondary sampling plan in GB/T2828, and the classification of non-conformity, inspection items, qualified quality level (AQL) and inspection level (IL) shall be in accordance with the provisions of Table 4. Table 4 Classification of non-conformity, inspection items, qualified quality level and inspection level Classification of non-conformity
Inspection items
Hexagonal flower size
Other items
6.3 The inspection lot submitted shall consist of products of the same specification and type. Qualified quality level (AQL)
6.4 During the inspection, the manufacturer shall replace the non-conforming products in the sample and the samples damaged during the inspection. 6.5 Products rejected after inspection may be reclassified or refurbished by the manufacturer before being submitted for acceptance. Packaging, marking, transportation and storage
Packaging, marking, transportation and storage shall comply with the provisions of GB/T5305. Inspection Level (IL)
GB/T5357—1998
Appendix A
(Indicative Appendix)
Special gauge for hexagonal flower size
Special gauge for hexagonal flower size consists of go gauge and no-go gaugeA1 Type and basic dimensions of go gauge
A1.1 Type
The type of go gauge is shown in Figure A1.
Figure A1 Go gauge
A1.2 Basic dimensions
The basic dimensions shall be in accordance with the provisions of Table A1.
A2 Type and basic dimensions of no-go gauge
A2.1 Type
The type of no-go gauge is shown in Figure A2.
Basic dimensions
A2.2 Basic dimensions
The basic dimensions shall be in accordance with the provisions of Table A2.
A3 Technical requirements
GB/T 5357---1998
Figure A2 No-go gauge
Basic dimensions
The technical requirements for special gauges for hexagonal flower-shaped dimensions shall be implemented in accordance with the provisions of GB1957. Appendix B
(Suggestive appendix)
Hexagonal flower-shaped test hole
B1 Type and basic dimensions
B1.1 Type
The type of hexagonal flower-shaped test hole is shown in Figure B1.
Figure B1 Hexagonal flower test hole
B1.2 Basic dimensions
GB/T5357--1998
The basic dimensions of the hexagonal flower test hole shall be in accordance with the provisions of Table B1 and Table B1
E (reference)
F (reference)
Technical requirements
Basic dimensions
B2.1 The inner hexagonal flower test hole shall be made of T10 or T10A specified in GB1298. B2.2 The heat treatment hardness of the inner hexagonal flower test hole shall not be less than 60HRC. 292
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