GB/T 29.2-1988 Cross recessed hexagon bolts with indentation

GB/T 29.1-1988 Hexagon bolts with slot on head—Product grade A and B

GB 29-1976

GB/T 29.2-2013 Hexagon bolts with cross recess on head

GB/T 1237-2000 Designation system for fasteners GB/T 196-2003 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 2-2001 Fasteners—Ends of parts with external thread GB/T 2-2016 Fasteners—Ends of parts with external thread 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 5267.1-2002 Fasteners—Electroplated coatings GB/T 5267.1-2023 Fasteners—Electroplate coating GB/T 5267.2-2002 Fasteners—Non-electrolytically applied zinc flake coatings GB/T 5267.2-2017 Fasteners—Non-electrolytically applied zinc flake coatings GB/T 5267.2-2021 Fasteners—Non-electrolytically applied zinc flake coatings GB/T 5267.3-2008 Fasteners—Hot dip galvanized coatings GB/T 5267.4-2009 Passivation of corrosion-resistant stainless-steel fasteners GB/T 5267.5-2024 Fasteners surface treatment—Part 5:Zinc thermal diffusion coatings GB/T 5779.1-2000 Fasteners—Surface discontinuities—Bolts,screws and studs for general requirements 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 90.3-2010 Fasteners—Quality assurance system GB 944.1 GB/T 196-2025 General purpose metric screw threads—Basic dimensions