GB/T 9074.3-1988 Cross recessed pan head screw and spring washer assemblies

GB/T 9074.3-1988 Cross recessed pan head screw and spring washer assembly GB/T9074.3-1988 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Cross recessed pan head screw and slngle coll springlockwasher assemblles
Subject content
This standard specifies the 1-shaped pan head screw and spring lock washer assemblies with thread specifications of M3M6. 2 Reference standards
GB818 Cross pan head screw
GB944.1 Cross recess for screws
GB9074.26 Spring lock washers for assemblies
GB5267 Electroplating layer of threaded fasteners
GB1237 Marking method of fasteners
GB90 Acceptance inspection, marking and packaging of fasteners 8 Dimensions
The dimensions are shown in the following figure and Table 1.
Type of the joint
Approved by the State Machinery Industry Commission on April 16, 1988496
UDC 621.682
GB 0T4.388
19a9-0101 implementation
Thread specification d
Note: The specifications in brackets should not be used as much as possible. GB 9074.8-$8
Controlled by process
② For screws with nominal length above the dotted line, the full thread is produced. 4 Technical conditions
The technical conditions are shown in Table 2.
Surface treatment
Other technical requirements
Acceptance leather packaging
GB 818
) Galvanized passivation
Graphic oxidation
: Except for amax, damax and rmin, the rest shall comply with the provisions of GB 818GE 94.1
GB5267www.bzxz.net
The washer should be able to rotate without falling off
GB9074.26
5 Marking
The marking method shall comply with the provisions of GB
Marking example:
GB9074.3-88
Thread specification d=M6, 2
Nominal length! =20mm, performance level 4.8, surface zinc-plated passivated 1-shaped pan head screw and spring washer assembly marking:
Screw assembly
Additional instructions:
M6 × 20
This standard is proposed by the National Fastener Standardization Technical Committee. This standard is under the jurisdiction of the National Machinery Industry Commission Standardization Institute. This standard is drafted by the National Machinery Industry Commission Standardization Institute. 498
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