This standard specifies the types, dimensions, specifications and designation of hexagon head bolts.
This standard is applicable to hexagon head bolts with threads from M1.6 up to M64, performance grades of 5.6, 8.8, 9.8, 10.9, A2-70, A4-70, A2-50, A4-50, CU2, CU3 and AL4, and product grade of Grades A and B. Grade A products are used for bolts with d=1.6 mm~24 mm and l≤10 d or l≤150 mm (whichever is the shorter); grades B products are used for bolts with d>24 mm or l>10 d or l>150 mm (whichever is the shorter).
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2 Fasteners – Ends of Parts with External Thread (GB/T 2-2016, ISO 4753:2011, MOD)
GB/T 5267.4 Passivation of Corrosion-resistant Stainless-steel Fasteners (GB/T 5267.4-2009, ISO 16048:2003, IDT)
GB/T 5276 Fasteners - Bolts, Screws, Studs and Nuts - Symbols and Designations of Dimensions (GB/T 5276-2015, ISO 225:2010, MOD)
GB/T 5779.1 Fasteners - Surface Discontinuities - Bolts, Screws and Studs for General Requirements (GB/T 5779.1-2000, idt ISO 6157-1:1988)
GB/T 5783 Hexagon Head Bolts - Full Thread (GB/T 5783-2016, ISO 4017:2011, MOD)
GB/T 9145 General Purpose Metric Screw Threads - Limits of Sizes for the Screw Threads of Medium Quality and Preferable Plan (GB/T 9145-2003, ISO 965-2:1998, MOD)
GB/T 16938 Fasteners - General Requirements for Bolts Screws Studs and Nuts (GB/T 16938-2008, ISO 8992:2005 , IDT)
3 Dimensions
See Figure 1 and Tables 1 and 2 for types and dimensions of bolts.
Symbols and descriptions of dimensions are specified in GB/T 5276.
Foreword i 1 Scope 2 Normative References 3 Dimensions 4 Specifications and Reference Standards 5 Designation
