Chinese Hexagonal Head Bolt Reference Standard

Understanding the Chinese hexagonal bolt standards is of great help for us to understand hexagonal bolts, as they have strict standards. The following is a detailed introduction to the Chinese hexagonal bolt standard for your reference.

1, Hexagonal head bolt range
The Chinese national standard GB/T5785-2000 specifies that the thread specifications for hexagonal bolts are M8 * 1~M64 * 4, fine thread, with performance grades of 5.6, 8.8, 9.8, 10.9, A2-70, A4-70, A2-50, A4-50, CU2, CU3, and AL4. The product grades are A and B. A is used for bolts with d=8~24mm and L<=10d or L<=150mm (whichever is smaller), while B is used for bolts with d>24mm or L>10d or L>150mm (whichever is smaller). If other technical requirements are needed, they should be selected from current standards (such as GB196, GB/T3106, GB/T3098.1, GB/T3098.6, and GB/T3103.1), and ethical considerations should be taken when selecting coarse threaded bolts specified in GB/T5782.
2, Chinese Hexagonal Head Bolt Reference Standard
In actual production, the Chinese hexagonal bolt standard needs to follow the following standards to ensure product quality and qualification:
1. GB/T2-1985 Fasteners - End of externally threaded parts
2. GB/T90-1985 Fastener Acceptance Inspection, Marking and Packaging
3. GB/T196-1981 Basic dimensions of ordinary threads (diameter 1~600mm)
4. GB/T197-1981 General thread tolerances and fit (diameter 1-355mm)
5. GB/T1237-2000 Fastener Marking Method (eqv ISO8991:1986)
6. GB/T3098.1-2000 Mechanical Properties of Fasteners - Bolts, Screws and Studs (idt ISO898-1:1999)
7. GB/T3098.6-2000 Mechanical Properties of Fasteners Stainless Steel Bolts, Screws and Studs
8. GB/T3098.10-1993 Mechanical properties of fasteners - Bolts, screws, studs and nuts made of non-ferrous metals
9. GB3103.1-1982 Fastener tolerances for bolts, screws, and nuts
10. GB/T3106-1982 nominal length of bolts, screws and studs and thread length of ordinary bolts
11. GB/T5267-1985 Electroplated coatings on herringbone fasteners
12. GB/T5276-1985 Fasteners - Size codes and markings for bolts, screws, studs and nuts
13. GB/T5779.1-2000 Fasteners - Surface Defects - General Requirements for Bolts, Screws, and Studs
14. GB/T5779.3-2000 Surface Defects in Fasteners, Bolts, Screws and Studs, Special Requirements
15. GB/T5282-2000 Hexagonal Head Bolt
16. GB/T5786-2000 Hexagonal Head Bolt Fine Thread Full Thread
17. GB/T16938-1997 Fasteners - General technical specifications for bolts, screws, studs and nuts
18. ISO10683:2000 Non electrolytic zinc powder coating for fasteners
The provisions contained in the above standards, which are referenced in this standard, constitute the provisions of this standard. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the above standards.
The above is a detailed introduction to the Chinese hexagonal bolt standards. By understanding the standards, we can better understand Chinese hexagonal bolts and choose appropriate bolts to use to ensure safety and quality.