1 Scope
This standard specifies the M12~M64×4 high strength bolts for joints of space grid structures (hereinafter referred to as "bolts").
This standard is applicable to the connection of joints of space grid structures.
2 Normative references
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions cited are valid. All the standards will be modified, however, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.
GB 2-85 Fasteners - Ends of parts with external thread
GB 90-85 Acceptance inspection, marking and packaging of fasteners
GB 196-81 General purpose screw threads - Basic dimensions for diameter from 1 to 600mm
GB 197-81 General purpose screw threads - Tolerances and fits for diameter from 1 to 355mm
GB 228-87 Metallic materials - Tensile testing
GB/T 230-91 Metallic materials－Rockwell hardness test
GB 699-88 Quality carbon structure steel - Technical requirements
GB 700-88 Ordinary carbon structural steel - Technical requirements
GB 1237-88 Designation system for fasteners
GB 1591-79 Low alloy structural steel - Technical requirements
GB 3077-88 Alloy structural steel - Technical requirements
GB 3098.1-82 Mechanical properties of fasteners - Bolts, screws and studs
GB 3103.1-82 Tolerances for fasteners - Bolts, screws and nuts
GB 5779.1-86 Surface discontinuities of fasteners on bolts, screws and studs for general requirements
3 Dimensions
3.1 The types and dimensions of bolts shall be as specified in Figure 1 and Table 1.
Foreword i
1 Scope
2 Normative references
3 Dimensions
4 Technical requirements
5 Marking
6 Mechanical properties
7 Test methods
8 Acceptance rules
9 Marking and packaging
Annex A (Informative) Bottom thickness of hexagon sockets and sealing plates or conical heads
Annex B (Normative) Technical conditions for 35VB steel
