GB/T 9074.17-1988 Hexagon head bolts, spring washers and flat washers assemblies

GB/T 9074.17-1988 Hexagon head bolts and spring washers and flat washers assemblies GB/T9074.17-1988 Standard download decompression password: www.bzxz.net

Subject content
National Standard of the People's Republic of China
Hexagon head bolt, spring washer
Plain washer assemblies
Hexagon headbolt,sinzlecoil sprinsJock washer and plain washerassenblieswww.bzxz.net
UDC 621.882
GB 9074.1T—8B
This standard specifies the hexagon head bolt, spring washer and plain washer assemblies with thread specifications of M3M12. 2 Reference standards
GB5783 Hexagon head bolts-Fully threaded-A and B grades GB 9074.26 Spring washers for assemblies
GE9074.24 Flat washers for assemblies
GB5267 Electroplating of threaded fasteners
GB1237 Marking method for fasteners
Fastener acceptance inspection, marking and packaging
3 Dimensions
The dimensions are shown in the following figure and Table 1.
Type of head-stem joint
Approved by the National Machinery Industry Committee on April 1, 1988 538
Implemented on January 1, 1989
Thread specifications
(reference)
Note 1 Avoid using the specifications in brackets as much as possible. GB 9074.11—88
Technical conditions
Technical conditions are shown in Table 2.
Other technical requirements
Acceptance and packaging
GB 9074.17—88
GB5783
Zinc passivation
②Oxidation
GB5287
GB 9074.26
The washer should be able to rotate smoothly without falling off
Note: Except for 4max, dnmax and rmin, the rest shall comply with the provisions of GB6783. 5 Marking
5.1 The marking method shall comply with the provisions of GB1237.
5.2 Marking example:
GB9074.24
Marking of hexagonal bolts, spring washers and flat washers with thread specification d=M5, nominal K degree 1=20mm, performance grade 8.8, surface galvanized and passivated:
Bolt assembly GB9074.17
M5×20
Additional instructions:
This standard is proposed by the National Technical Committee for Standardization of Fasteners. This standard is under the jurisdiction of the Standardization Institute of the National Machinery Industry Commission. This standard is drafted by the Standardization Institute of the National Machinery Industry Commission. 540
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