GB 2673 - 1986 Hexagon lobular socket countersunk head screws


Unit: mm
国标GB 2673 - 1986 GB2673 2673GB Hexagon lobular socket countersunk head screws
Nominal Length L Tips:seclect Nominal Length L and get Weight .
Screw Thread
d
M6 M8 M10 M12 (M14) M16 M20
P Pitch
a max
b min
dk Theoretical max
Actual max
min
k max
r max
Socket No.
t max
min
B max
x max
1 1.25 1.5 1.75 2 2 2.5
2 2.5 3 3.5 4 4 5
38 38 38 48 48 48 48
12.6 17.3 20 24 28 32 40
11.3 15.8 18.3 22 25.5 29 36
10.9 15.4 17.8 21.5 25 28.5 35.4
3.3 4.65 5 6 7 8 10
1.5 2 2.5 2.5 2.5 3 3
T30 T40 T50 T55 T55 T60 T80
1.8 2.5 2.7 3.5 3.7 4.1 6
1.4 2.1 2.3 3.02 3.22 3.62 5.42
4.15 5 6.62 8.2 8.2 9.8 13
2.5 3.2 3.8 4.3 5 5 6.3
Weight of per 1000 steel products(≈kg)
- - - - - - -
Alternative history
Similar Standards
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Screws With Six Lobes Recessed Countersunk Head - Symbol FX