QC/T 1252-2025 Heat resistant 12-point head nuts for automobile

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 3098.8-1992 Mechanical properties of fasteners—Components for bolted connections made mainly from materials with a high temperature strength GB/T 3098.8-2010 Mechanical properties of fasteners Parts for bolted connections for use at temperatures from -200 ℃～+700 ℃ GB/T 3103.4-1992 Tolerances for fasteners—Components for bolted connections made mainly from materials with a high temperature strength GB/T 3103.4-2014 Tolerances for fasteners—Bolt/nut assemblies for service temperatures from -200 ℃～＋700 ℃ 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 14992-2005 Classification and designation for superalloys and high temperature intermetallic materials GB/T 14992-2025 Superalloys and intermetallic compounds—Designation and chemical composition 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 EN 10269