QC/T 1254-2025 Round weld nuts for vehicle, type B English, Anglais, Englisch, Inglés, えいご
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ICS
T
Professional Standard of the People's Republic of China
QC/T 1254-2025
Round weld nuts for vehicle, type B
汽车用B型焊接圆螺母
(English Translation)
Issue date: 2025-12-17 Implementation date: 2026-07-01
Issued by the Ministry of Industry and Information Technology of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Type Dimensions
5 Technical Conditions
6 Product Numbering
Type B Weld-on Round Nuts for Automotive Use
1 Scope
This document specifies the types, dimensions, technical conditions, and product numbering for Type B weld-on round nuts for automotive use.
This document applies to Type B weld-on round nuts for automotive use with thread sizes M5–M12, mechanical property classes 8 and 10, and product grade A.
2 Normative References
The contents of the following documents constitute essential provisions of this document through normative reference. For dated references, only the edition corresponding to the date applies. For undated references, the latest edition (including all amendments) applies.
GB/T 90.1 Fasteners - Inspection and Acceptance
GB/T 90.2 Fasteners - Marking and Packaging
GB/T 196 Basic Dimensions of General Purpose Metric Threads
GB/T 197 General Purpose Metric Screw Threads - Tolerances
GB/T 3098.2 Mechanical Properties of Fasteners - Nuts
GB/T 3103.1 Fasteners - Tolerances - Bolts, Screws, Studs and Nuts
GB/T 5276 Fasteners - Bolts, Screws, Studs and Nuts - Symbols and Designations of Dimensions
GB/T 5779.2 Fasteners Surface Discontinuities - Nuts
GB/T 30512 Requirements for Prohibited Substances in Automobiles
QC/T 326 Product Numbering Rules for Automotive Fasteners
QC/T 625 Coatings and Chemical Treatment Layers for Automotive Use
3 Terms and Definitions
This document does not define any specific terms and definitions.
4 Types and Dimensions
The types and dimensions for Type B weld-on round nuts for automotive use are shown in
Figure 1 and Table 1. Symbols and designations of dimensions shall comply with the provisions of GB/T 5276.
5 Technical Conditions
The technical conditions for Type B weld-on round nuts for automotive use shall comply with the provisions of Table 2.
Table 2 Technical Conditions
6 Product Numbering
The product numbering for Type B weld-on round nuts for automotive use shall comply with the provisions of QC/T 326.
Appendix A
(Informative)
Base Plate Thickness and Hole Diameter for Type B Weld-on Round Nuts for Automotive Use
The base plate thickness and hole diameter for Type B weld-on round nuts for automotive use shall comply with the provisions of Table A.1.
Table A.1 Base Plate Thickness and Hole Diameter for Type B Weld-on Round Nuts for Automotive Use
