GB/T 5790-1986 Hexagonal flange bolts, enlarged series, thin shank, grade B

GB/T 5790-1986 Hexagonal Flange Bolts, Large Series, Thin Shaft, Grade B GB/T5790-1986 Standard Download Decompression Password: www.bzxz.net

1 Introduction
National Standard of the People's Republic of China
Hexagon flange bolts-Heavg series-Product grade B
UDC 621.882.6
GB5790-86
This standard specifies "hexagon flange bolts with thread specifications of M5 to M20, width across flats of enlarged series, thin shank, grade B. 2 Reference standards
GB196-81 "Basic dimensions of ordinary threads (diameter 1 to 600mm)", GB197-81 "Tolerances and fits of ordinary threads (diameter 1-355mm)" GB2-85 "Fasteners-Ends of externally threaded parts"; GB3098.1-82 "Mechanical properties of fasteners bolts, screws and studs 》GB3098.6-86 "Mechanical properties of fasteners-stainless steel bolts, screws, studs and nuts": GB3103.1-82 "Fastener tolerances bolts screws and nuts", GB5267-85 "Threaded fasteners electroplating" GB5779.186 "Fastener surface defects-bolts, screws and studs-general requirements" GB90-85 "Fastener acceptance inspection, marking and packaging". 3 Dimensions
Commodity specifications are specified in the figure, table 1 and table 2. National Bureau of Standards issued on January 17, 1986
1986-10 - 01 implementation
15 ~ 25
The type of the solid hole is selected by the manufacturer
0~1:30
15～30
The end shall be in accordance with the provisions of GB 2-85
Igmax =+ Highway-b consideration
Ismin =Igmax- 5 P;
dw thread diameter:
P pitch.
X magnification
GB 579 0 --8 6
Chamfered end
The bearing surface and the sharp angle
should be smoothly connected
Thread specification d
b reference number
da max
Note: The specification M6 in the number may not be used
GB 590—86
Technical conditions
As specified in Table 3.
Mechanical properties
Product grade
Surface treatment
Surface defects
Acceptance and packaging
5 Marking
GB 579086bzxZ.net
GB 196—81, GB 197—81
8.8 ~10.9
GB 3098.1—82
①Oxidation
②Zinc passivation GB5267—85
GB3103.1—82
GB 5779.1—86
GB90—85
Stainless steel
A2—70
GB 309B.6—86
Untreated
Marking example of hexagonal flange bolts with thread specification d=M12, nominal length 1=80mm, performance grade 8.8, surface oxidation, thin shank, type A or B;
Bolt GB5790—86—M12×80
Marking example of hexagonal flange bolts with thread specification d=M12, nominal length 1=80mm, performance grade 8.8, surface oxidation, thin shank, type A:
Bolt GB5790—86—AM12×80
Additional instructions:
This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China and is under the jurisdiction of the Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Standardization Research Institute of the Ministry of Machinery Industry.
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