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Indented hexagon head screws, product grade A, Type 4

GOST 7805 (-4) - 1970

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俄标GOST 7805 (-4) - 1970 GOST7805 7805GOS Indented hexagon head screws, product grade A, Type 4
Nominal Length L Tips:seclect Nominal Length L and get Thread length.
Thread Size
d
M1.6 M2 M2.5 M3 (M3.5) M4 M5 M6 M8 M10 M12
P pitch Coarse thread
Fine thread
ds
s
k
e min
dw min
c min
max
0.35 0.4 0.45 0.5 0.6 0.7 0.8 1 1.25 1.5 1.75
/ / / / / / / / 1 1.25 1.25
1.6 2 2.5 3 3.5 4 5 6 8 10 12
3.2 4 5 5.5 6 7 8 10 13 16 18
1.1 1.4 1.7 2 2.4 2.8 3.5 4 5.3 6.4 7.5
3.4 4.3 5.5 6 6.6 7.7 8.8 11.1 14.4 17.8 20
2.3 3.1 4.1 4.6 5.1 5.9 6.9 8.9 11.6 14.6 16.6
/ / / 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
/ / / 0.4 0.4 0.4 0.5 0.5 0.6 0.6 0.6
Length of Thread b
- - - - - - - - - - -
Thread Size
d
(M14) M16 (M18) M20 (M22) M24 (M27) M30 M36 M42 M48
P pitch Coarse thread
Fine thread
ds
s
k
e min
dw min
c min
max
2 2 2.5 2.5 2.5 3 3 3.5 4 4.5 5
1.5 1.5 1.5 1.5 1.5 2 2 2 3 3 3
14 16 18 20 22 24 27 30 36 42 48
21 24 27 30 34 36 41 46 55 65 75
8.8 10 12 12.5 14 15 17 18.7 22.5 26 30
23.4 26.8 30.1 33.5 37.7 40 45.6 51.3 61.3 72.6 83.9
19.6 22.5 25.3 28.2 31.7 33.6 38 42.7 51.1 61 70.5
0.15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.25 0.25
0.6 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
Length of Thread b
- - - - - - - - - - -
①,Length L tolerance: js15.
②,h=（0.2÷0.4）k.
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