QC/T 1254-2025 Round weld nuts for vehicle,type B

GB/T 90.1-2002 Fasteners—Acceptance inspection GB/T 90.1-2023 Fasteners—Acceptance inspection GB/T 90.2-2002 Fasteners—Marking and packaging GB/T 196-2003 General purpose metric screw threads—Basic dimensions GB/T 196-2025 General purpose metric screw threads—Basic dimensions GB/T 197-2003 General purpose metric screw threads—Tolerances GB/T 197-2018 General purpose metric screw threads—Tolerances GB/T 3098.2-2000 Mechanical properties of fasteners—Nuts—Coarse thread GB/T 3098.2-2015 Mechanical properties of fasteners—Nuts GB/T 3098.2-2025 Mechanical properties of fasteners—Part 2:Nuts GB/T 3103.1-2002 Tolerances for fasteners—Bolts, screws, studs and nuts GB/T 5276-2015 Fasteners—Bolts,screws,studs and nuts—Symbols and descriptions of dimensions GB/T 5779.2-2000 Fasteners—Surface discontinuities—Nuts GB/T 30512-2014 Requirements for prohibited substances on automobiles QC/T 326-2013 Car standard parts product numbering rules QC/T 326-2025 Numbering rules for automotive standardized parts QC/T 625-2024 Metallic coatings and conversion coatings for automobile QC/T 625-2013 Car coating and plating layers and chemical treatment layers