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(Non-preferred) dimensions in parentheses.

Unit:mm

External Tooth Spring Lock Washers 【Table 10】TW/B

JIS B 1251 (TW/B) - 2018

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日标JIS B1251 (TW/B) - 2018 JIS1251 1251JI External Tooth Spring Lock Washers 【Table 10】TW/B
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 *Models with different eras.

Nominal Diameter
d
3 (3.5) 4 (4.5) 5 6 (7) 8
d min=nominal size
max
dc max=nominal size
min
t Nominal Size
max
min
h ≈
Number of Teeth
3.2 3.7 4.3 4.8 5.3 6.4 7.4 8.4
3.4 3.9 4.5 5 5.5 6.7 7.7 8.7
6.5 7.5 8.5 9.5 10 11 13 15
6.1 7.1 8.1 9.1 9.6 10.5 12.5 14.5
0.45 0.45 0.45 0.5 0.6 0.6 0.8 0.8
0.485 0.485 0.485 0.535 0.64 0.64 0.85 0.85
0.415 0.415 0.415 0.465 0.56 0.56 0.75 0.75
0.9 0.9 0.9 1 1.2 1.2 1.6 1.6
8 8 9 9 10 12 12 12
Nominal Diameter
d
10 12 (14) 16 (18) 20 (22) 24
d min=nominal size
max
dc max=nominal size
min
t Nominal Size
max
min
h ≈
Number of Teeth
10.5 12.5 14.5 16.5 19 21 23 25
10.9 12.9 14.9 16.9 19.5 21.5 23.5 25.5
18 21 23 26 29 32 35 38
17.5 20.4 22.4 25.4 28.4 31.2 34.2 37.2
0.9 1 1 1.2 1.2 1.4 1.4 1.6
0.95 1.055 1.055 1.265 1.265 1.47 1.47 1.68
0.85 0.945 0.945 1.135 1.135 1.33 1.33 1.52
1.8 2 2 2.4 2.4 2.8 2.8 3.2
12 12 12 14 14 14 16 16

Alternative history

JIS B 1251 - 2001 JIS B 1251 - 2018
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