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Curved Spring Lock Washers 【Table 8】WW/No.3

JIS B 1251 (WW/No.3) - 2001

Display drawing:

 *Models with different eras.

Size
Φ2.5 Φ3 (Φ3.5) Φ4 Φ5 Φ6 Φ8 Φ10
d max
min=nominal size
b Nominal Size
max
min
t Nominal Size
max
min
dc max
H0 (≈1.5h)
2.9 3.4 3.9 4.4 5.4 6.5 8.6 10.8
2.6 3.1 3.6 4.1 5.1 6.1 8.2 10.2
1 1.3 1.3 1.5 1.8 2.5 3 3.5
1.1 1.4 1.4 1.6 1.9 2.65 3.15 3.7
0.9 1.2 1.2 1.4 1.7 2.35 2.85 3.3
0.6 0.7 0.7 0.8 1 1.2 1.6 1.8
0.7 0.8 0.8 0.9 1.1 1.3 1.7 1.95
0.5 0.6 0.6 0.7 0.9 1.1 1.5 1.65
5.2 6.3 6.8 7.7 9.4 11.9 15 18.4
0.9 1.05 1.05 1.2 1.5 1.8 2.4 2.7
Size
Φ12 (Φ14) Φ16 (Φ18) Φ20 (Φ22) Φ24 Φ27
d max
min=nominal size
b Nominal Size
max
min
t Nominal Size
max
min
dc max
H0 (≈1.5h)
13 15 17.2 19.2 21.4 23.7 25.7 28.7
12.2 14.2 16.2 18.2 20.2 22.5 24.5 27.5
4 4.5 5 5.5 6 6.5 7 7
4.2 4.7 5.2 5.7 6.2 6.7 7.25 7.25
3.8 4.3 4.8 5.3 5.8 6.3 6.75 6.75
2.1 2.4 2.8 3 3.2 3.5 3.8 4
2.25 2.55 3 3.2 3.4 3.7 4.05 4.25
1.95 2.25 2.6 2.8 3 3.3 3.55 3.75
21.6 24.6 27.8 30.6 33.8 37.1 40.2 43
3.15 3.6 4.2 4.5 4.8 5.3 5.7 6

Alternative history