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GB 12 - 1976 Semi-round head square neck bolts


Unit: 毫米(mm)
Weight Calculator
L
Thread Size
d
M6 M8 M10
P Pitch
dk Nominal Size
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min
k Nominal Size
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min
s Nominal Size
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k1 Nominal Size
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r
1.00 1.25 1.50
12 16 20
13.1 17.1 21.3
11.3 15.3 19.16
3.6 4.8 6
4.08 5.28 6.48
3.2 4.4 5.6
6 8 10
6.3 8.36 10.36
5.84 7.8 9.8
4 5 6
4.4 5.4 6.4
3.6 4.6 5.6
7 9 11
per 1000 units ≈ kg(7.85kg/cm3)
- - -
Thread Length
b
- - -
Alternative history GB 12 - 1976 GB /T 12 - 1988 GB /T 12 - 2013
Suppliers
Best price if from GlobalFastener.com
  • Suzhou Hanlinyu Precision Hardware Co., Ltd.
  • Contact: Amy Li
    Cellphone: 86-13771867939
    QQ: 点击这里给我发消息402398463
    email: 402398463@qq.com
    Material: Carbon steel, Stainless steel; Grade: 8.8; Specifications: M6-M20

    I can supply
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