GB/T 9074.10-1988 Cross recessed countersunk head screw and conical locking washer assemblies

GB/T 9074.10-1988 Cross recessed countersunk head screw and conical locking washer assembly GB/T9074.10-1988 Standard download decompression password: www.bzxz.net

Subject content
National Standard of the People's Republic of China
Cross recessed raised countersunk headscrew and countersunk external toothedlock washer assemhlles
UDC 621.882
GB 9014.1088
This standard specifies cross recessed raised countersunk headscrews and countersunk external toothedlock washer assemblies with thread specifications of M3 to M8. 2
Referenced standards
GB820 Cross recessed countersunk head screws
GB 944.1 Cross recessed screws
GB9074.28 Conical locking washers for assemblies GB 5267 Electroplating layer of threaded fasteners
GB1237 Marking method for fasteners
GB 90 Acceptance inspection, marking and packaging of fasteners 3 Dimensions
The dimensions are shown in the following figure and Table 1.
Approved by the State Machinery Industry Commission on April 16, 1888, and implemented on January 1, 1989
Thread specification
《14）
(（55）
Note: ① Avoid using the specifications in brackets as much as possible. General
GB 9074.10--88
② For screws with a nominal length above the dotted line, the full thread 518
Technical conditions
Technical conditions are shown in Table 2.
Note: Except for αmax, the rest shall comply with the provisions of GB 820. 6 Marking
5.1 The marking method shall comply with the provisions of GB1237.
5.2 Marking example:
GB 90T4.10--88
GB 820wwW.bzxz.Net
H type GH 944.1
(）Zinc plating
③Oxidation
GB5267
GB9074.28
The washer should be able to rotate without falling off
Thread specification d = M 5, nominal length /-20mm, performance level 4.8, surface zinc-plated passivated I-slot countersunk head screws and conical locking full circle assemblies marking: screw assemblies
GB 9074.10
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 Standardization Institute of the State Machinery Industry Commission. This standard is drafted by the Standardization Institute of the State Machinery Industry Commission. 519
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