QC/T 1256-2025 Hexagon bolts with flange for automobile

GB/T 2-2001 Fasteners—Ends of parts with external thread GB/T 2-2016 Fasteners—Ends of parts with external thread 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 193-2003 General purpose metric screw threads—General plan GB/T 3098.1-2000 Mechanical properties of fasteners—Bolts, screws and studs GB/T 3098.1-2010 Mechanical properties of fasteners—Bolts,screws and studs 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 5779.3-2000 Fasteners—Surface discontinuities—Bolts,screws and studs for special requirements GB/T 9145-2003 General purpose metric screw threads—Limits of sizes for the screw threads of medium quality and preferable plan 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