GB/T 5780-2016 in English

《GB/T 5780-2016六角头螺栓 C级》由TC85（全国紧固件标准化技术委员会）归口，主管部门为中国机械工业联合会。

1 Scope

This standard specifies the type dimensions, technical conditions and designation of Grade C hexagon head bolt.
This standard specifies the characteristics of hexagon head bolts with threads from M5 up to and including M64, of product Grade C, property grade of Grades 4.6 and 4.8 and production grade C.

2 Normative References

The following documents for the application of this document are essential. For dated reference, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 90.1 Fasteners – Acceptance inspection (GB/T 90.1-2002, ISO 3269: 2000, IDT)
GB/T 90.2 Fasteners – Marking and Packaging
GB/T 193 Purpose Metric Screw Threads – General Plan (GB/T l93-2003, ISO 261:1998, MOD)
GB/T 1237 Designation System for Fasteners (GB/T 1237-2000, eqv ISO 8991:1986)
GB/T 3098.1 Mechanical Properties of Fasteners – Bolts, Screws and Studs (GB/T 3098.1-2010, ISO 898-1:2009, MOD)
GB/T 3103.1 Tolerances for Fasteners-Bolts, Screws and Nuts (GB/T 3103.1-2002, idt ISO 4759-1:2000)
GB/T 5267.1 Fasteners – Electroplated Coatings (GB/T 5267.1-2002, ISO 4042:1999, IDT)
GB/T 5267.2 Fasteners – Non-electrolytically Applied Zinc Flake Coatings (GB/T 5267.2-2002, ISO 10683:2000, 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 5781 Hexagon Head Bolt – Full Thread – Product Grade C (GB/T 5781-2016, ISO 4018:2011, 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 Blots, Screws, Studs and Nuts (GB/T 16938-2008, ISO 8992:2005, IDT)

3 Dimension

Foreword I
1 Scope
2 Normative References
3 Dimension
4 Specifications and Normative References
5 Designation