GB /T 819.1 - 2000 Cross recessed countersunk head screws


Unit: mm
国标GB /T819.1 - 2000 GB819.1 819.1GB Cross recessed countersunk head screws
Nominal Length L Tips:seclect Nominal Length L and get Weight .
Screw Thread
d
M1.6 M2 M2.5 M3 (M3.5) M4 M5 M6 M8 M10
P Pitch
b min
dk max
min
k max=nominal size
Socket No.
m H type
Z type
Penetration depth Type H max
min
Type Z max
min
0.35 0.4 0.45 0.5 0.6 0.7 0.8 1 1.25 1.5
25 25 25 25 38 38 38 38 38 38
3.0 3.8 4.7 5.5 7.30 8.40 9.30 11.30 15.80 18.30
2.7 3.5 4.4 5.2 6.94 8.04 8.94 10.87 15.37 17.78
1 1.2 1.5 1.65 2.35 2.7 2.7 3.3 4.65 5
0 0 1 1 2 2 2 3 4 4
1.6 1.9 2.9 3.2 4.4 4.6 5.2 6.8 8.9 10
1.6 1.9 2.8 3 4.1 4.4 4.9 6.6 8.8 9.8
0.9 1.2 1.8 2.1 2.4 2.6 3.2 3.5 4.6 5.7
0.6 0.9 1.4 1.7 1.9 2.1 2.7 3.0 4.0 5.1
0.95 1.2 1.73 2.01 2.2 2.51 3.05 3.45 4.6 5.64
0.7 0.95 1.48 1.76 1.75 2.06 2.6 3 4.15 5.19
Weight of per 1000 steel products(≈kg)
- - - - - - - - - -
①,The diameter of the unthreaded portion is approximately equal to the diameter of the pitch or allowed to equal the major diameter of the thread.
Alternative history
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