JIS B 1189 (Type 1) – 2014 – Bu lông long đen
Nominal Diameter | M4 | M5 | M6 | M8 | M10 | M12 | |
d | |||||||
P | Coarse thread | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 |
Fine thread | / | / | / | 1 | 1.25 | 1.25 | |
ds | max=nominal size | 4 | 5 | 6 | 8 | 10 | 12 |
min | 3.9 | 4.9 | 5.9 | 7.85 | 9.85 | 11.8 | |
s | max=nominal size | 7 | 8 | 10 | 12 | 14 | 17 |
min | 6.8 | 7.8 | 9.8 | 11.75 | 13.75 | 16.75 | |
e | min | 7.74 | 8.87 | 11.05 | 13.25 | 15.51 | 18.9 |
dc | max | 10.5 | 12 | 14 | 17.5 | 21 | 25 |
dw | min | 7.5 | 9 | 11 | 14.5 | 18 | 22 |
k | max | 3.6 | 4.5 | 5.4 | 6.9 | 8.5 | 10.2 |
k1 | min | 2.4 | 3 | 3.6 | 4.8 | 6 | 7.2 |
c | Ref. | 0.8 | 1 | 1.2 | 1.4 | 1.6 | 2 |
max | 0.95 | 1.15 | 1.4 | 1.6 | 1.85 | 2.25 | |
min | 0.65 | 0.85 | 1 | 1.2 | 1.35 | 1.75 | |
r1 | max | 0.6 | 0.7 | 0.8 | 1.1 | 1.4 | 1.6 |
r | min | 0.2 | 0.2 | 0.25 | 0.4 | 0.4 | 0.6 |
da | max | 4.7 | 5.7 | 6.8 | 9.2 | 11.2 | 14.2 |
kw | min | 1.6 | 2 | 2.3 | 3.1 | 3.9 | 4.7 |
x | 1.4 | 1.6 | 2 | 2.5 | 3 | 3.5 | |
Length of Thread b | – | – | – | – | – | – |