GB/T 5784-1986 Hexagon head bolts with thin shank, Grade B

GB/T 5784-1986 Hexagon head bolts with thin shank, grade B GB/T5784-1986 Standard download decompression password: www.bzxz.net

Screw efficiency specification
125200
150148
CB 57B4—86
minnxmin
: ①Try not to use the specifications in brackets. ②The range between the broken lines is the product specification range.
Required length!
minmax
4Technical conditions
Please refer to Table 2.
Mechanical properties
Product grade
Surface treatment
Surface defects
Acceptance and packagingwww.bzxz.net
5 Marking
GB5784—86
GB 196—81, GB 197—81
5,8,6.8,8.8
Stainless steel
A2—70
GB 3098,6--86
GB3098.182
GB 3103.1—82
①Untreated
②Galvanized passivation
Untreated
GB 5267--85
GB 5779.1—86
GB 90 -- 85
Marking example of hexagonal head bolts with thread specification d=M12, nominal length l=80mm, performance grade 5.8, no surface treatment, grade B:
GB 5784--86—M12×80
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. The Standardization Research Institute of the Ministry of Machinery Industry is responsible for drafting this standard.
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