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GB 21 - 1976 Small hexagon head bolts


Unit: 毫米(mm)
Weight Calculator
L
Thread Size
d
M8 M10 M12
P Pitch
s max
min
k Nominal Size
max
min
e
r
1.25 1.5 1.75
12 14 17
11.76 13.76 16.76
5 6 7
5.24 6.24 7.29
4.76 5.76 6.71
13.8 16.2 19.6
0.4 0.4 0.6
per 1000 units ≈ kg(7.85kg/cm3)
- - -
Thread Length
b
- - -
Alternative history GB 21 - 1976 GB 5785 - 1985 GB /T 5785 - 2000 GB /T 5785 - 2016
Equivalent standard
GB GB /T 5785
ISO ISO 8765
DIN DIN EN ISO 8765
Some of the above standards may be approximate equivalent. If there is any objection, the standard original shall prevail.
Suppliers
Best price if from GlobalFastener.com
  • Ningbo SiTuo Fastener Co., Ltd
  • Contact: Petty Cao
    Cellphone: 86-15381997760
    email: silany_1122@163.com
    Material: carbon steel, stainless steel; Grade: 4.8, 8.8, 10.9, 12.9; Surface treatment: according to customer requirements; Complete specifications, non-standard customization.

    I can supply
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