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GB /T 6561 - 1986 Cross recessed countersunk head thread forming screws

Weight Calculator Message Error Correction 中文版

Unit: 毫米(mm)
Weight Calculator
L
Thread Size
d
M2.5 M3 M4
P Pitch
a max
b min
dk max
min
k max
r min
x max
Socket No.
m Ref.
Penetration depth min
max
0.45 0.5 0.7
0.9 1 1.4
12 18 24
4.7 5.5 8.4
4.4 5.2 8
1.5 1.65 2.7
0.6 0.8 1
1.1 1.25 1.75
1 1 2
2.9 3.2 4.6
1.4 1.7 2.1
1.8 2.1 2.6
per 1000 units ≈ kg(7.85kg/cm3)
- - -
Alternative history GB /T 6561 - 1986 GB /T 6561 - 2014

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