T/SZJGJ 001-2024 Active Group standards

T/SZJGJ 001-2024 Cross-shaped Fasteners

T/SZJGJ 001-2024

Publish Date: 2024-03-16 Implement Date: 2024-03-27 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/SZJGJ 001-2024

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Fasteners Comprehensive

Publish Date: 2024-03-16

Implement Date: 2024-03-27

Scope

Main technical content: 4.4 Mechanical and physical properties 4.4.1 Yield strength, tensile strength, hardness, and breaking torque - Machine screws shall comply with the provisions of GB/T 3098.1 or GB/T 3098.6. - Self-tapping screws shall comply with the provisions of GB/T 3098.5 or GB/T 3098.21. 4.4.2 Thread accuracy - Machine screws shall meet the requirements of GB/T 197. - Self-tapping screws shall meet the requirements of GB/T 5280 4.5 Surface defects - Surface defects shall comply with the requirements of GB/T 5779.1. 4.6 Corrosion resistance - Products shall pass a neutral salt spray test for ≥2 hours without any corrosion. 5 Test methods 5.1 Appearance quality 5.2 Dimensional tolerances - Dimensional tolerances shall be inspected according to the methods specified in JB/T 9151.1. 5.3 Mechanical properties 5.3.1 Yield strength - Machine screws shall be tested according to the methods specified in GB/T 3098.1 or GB/T 3098.6. 5.3.2 Tensile strength - Tensile strength (Rm) shall be measured on fasteners with L≥2.5d. The unthreaded length of the screws shall be greater than or equal to 2.5d. 5.3.3 Hardness - Hardness shall be tested according to the methods specified in GB/T 230.1. 5.3.4 Breaking torque - Breaking torque shall be tested according to the methods specified in GB/T 3098.13.