GB/T 9074.11-1988 Cross recessed hexagon head bolt and plain washer assemblies

GB/T 9074.11-1988 Cross recessed hexagonal head bolt and plain washer assembly GB/T9074.11-1988 Standard download decompression password: www.bzxz.net

Subject content
National Standard of the People's Republic of China
Cross recessed hexagon boltwithindentation and plain washer assembllesUDC 821.882
GB 9074.11—8B
This standard specifies the cross recessed hexagon boltwithindentation and plain washer assemblles with thread specifications of M3 to MB. 2
Reference standardsbzxZ.net
GB29.2 Cross recessed hexagonal head bolts
GB944.1 Cross recessed screws
GB9074.24 Flat washers for assemblies
GB5267 Electroplating layer of threaded fasteners
GB1237 Marking method for fasteners
GB90 Acceptance inspection, marking and packaging dimensions of fasteners
The dimensions are shown in the figure below and Table 1.
Type of the joint of the head and rod
Approved by the State Machinery Industry Commission on April 16, 188520
Implemented on January 1, 1989
Thread specification d
Note: () The specifications in brackets should not be used as much as possible.
GB 9074: 11-88
For bolts with nominal quality above the hidden line, full threads are produced. Standard
4 Technical conditions
The technical conditions are shown in Table 2.
GB9074.11-88
H type GH 944.1
①Galvanized passivation GB 5267
②Oxidation
CB9074.24
The pad should be able to rotate freely without falling off
Note, except for emax, damax and rmin, the rest shall comply with the provisions of GB29.2. Marking
The marking method shall comply with the provisions of GB1237.
5.2 Marking example:
Thread specification d-M5, nominal length l=20mm, performance level 5.8, surface zinc-plated passivated cross recessed hexagonal head bolt and flat ring assembly marking:
Bolt assembly
GB 9074.11
Additional instructions:
M 5 × 20
This standard is proposed by the National Technical Committee for Standardization of Fasteners. This standard is under the jurisdiction of the National Machinery Industry Committee Standardization Institute. This standard was drafted by the National Machinery Industry Committee Standardization Institute. 522
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