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Unit:mm

Hexagon Head Bolts (Semi-finished) [Annex 1 Attached Table 1.2]

JIS B 1180 (AT1.2) - 2004

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日标JIS B1180 (AT1.2) - 2004 JIS1180 1180J Hexagon Head Bolts (Semi-finished) [Annex 1 Attached Table 1.2]
Nominal Length L Tips:seclect Nominal Length L and get Thread length.
Screw Thread
d
M6 (M7) M8 M10 M12 (M14) M16 (M18) M20 (M22) M24 (M27)
P Pitch coarse thread
Fine thread
ds max
min
k Nominal Size
max
min
s max
min
e ≈
D ≈
r min
da max
z ≈
c ≈
1 1 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3 3
/ / 1 1.25 1.25 1.5 1.5 1.5 1.5 1.5 2 2
6 7 8 10 12 14 16 18 20 22 24 27
5.8 6.8 7.8 9.8 11.75 13.75 15.75 17.75 19.65 21.65 23.65 26.65
4 5 5.5 7 8 9 10 12 13 14 15 17
4.25 5.25 5.75 7.3 8.3 9.3 10.3 12.35 13.35 14.35 15.35 17.35
3.75 4.75 5.25 6.7 7.7 8.7 9.7 11.65 12.65 13.65 14.65 16.65
10 11 13 17 19 22 24 27 30 32 36 41
9.4 10.3 12.3 16.3 18.2 21.2 23.2 26.2 29.2 31 35 40
11.5 12.7 15 19.6 21.9 25.4 27.7 31.2 34.6 37 41.6 47.3
9.8 10.7 12.6 16.5 18 21 23 26 29 31 34 39
0.25 0.25 0.4 0.4 0.6 0.6 0.6 0.6 0.8 0.8 0.8 1
6.8 7.8 9.2 11.2 13.7 15.7 17.7 20.2 22.4 24.4 26.4 30.4
1 1 1.2 1.5 2 2 2 2.5 2.5 2.5 3 3
0.4 0.4 0.4 0.4 0.6 0.6 0.6 0.6 0.6 0.6 0.6 /
Length of Thread b
- - - - - - - - - - - -
Screw Thread
d
M30 (M33) M36 (M39) M42 (M45) M48 (M52) M56 (M60) M64
P Pitch coarse thread
Fine thread
ds max
min
k Nominal Size
max
min
s max
min
e ≈
D ≈
r min
da max
z ≈
c ≈
3.5 3.5 4 4 4.5 4.5 5 5 5.5 5.5 6
2 2 3 3 / / / / / / /
30 33 36 39 42 45 48 52 56 60 64
29.65 32.6 35.6 38.6 41.6 44.6 47.6 51.55 55.55 59.55 63.55
19 21 23 25 26 28 30 33 35 38 40
19.4 21.4 23.4 25.4 26.4 28.4 30.4 33.5 35.5 38.5 40.5
18.6 20.6 22.6 24.6 25.6 27.6 29.6 32.5 34.5 37.5 39.5
46 50 55 60 65 70 75 80 85 90 95
45 49 53.8 58.8 63.8 68.8 73.8 78.8 83.6 88.6 93.6
53.1 57.7 63.5 69.3 75 80.8 86.5 92.4 98.1 104 110
44 48 53 57 62 67 72 77 82 87 92
1 1 1 1 1.2 1.2 1.6 1.6 2 2 2
33.4 36.4 39.4 42.4 45.6 48.6 52.6 56.6 63 67 71
3.5 3.5 4 4 4.5 4.5 5 5 5.5 5.5 6
/ / / / / / / / / / /
Length of Thread b
- - - - - - - - - - -
①,b + x ≥ L: full thread, x=2P.

Alternative history

JIS B 1180AT1.2 - 1994 JIS B 1180AT1.2 - 2004
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