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(Non-preferred) dimensions in parentheses.

Spring Lock Washer - Relular Type [Table 4] SW/No.2

JIS B 1251 (SW/No.2) - 2018

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^*Models with different eras.

Nominal Diameter
d

Φ2

Φ2.5

Φ3

(Φ3.5)

Φ4

(Φ4.5)

Φ5

Φ6

(Φ7)

Φ8

Φ10

Φ12

d	min=nominal size
d	max
n	min
h	min
d_c	max
H	(≈2h)

2.1	2.6	3.1	3.6	4.1	4.6	5.1	6.1	7.1	8.2	10.2	12.2
2.35	2.9	3.4	3.9	4.5	5	5.5	6.5	7.5	8.7	10.7	12.8
0.9	1	1.1	1.2	1.4	1.5	1.7	2.7	2.8	3.2	3.7	4.2
0.5	0.6	0.7	0.8	1	1.2	1.3	1.5	1.6	2	2.5	3
4.4	5.2	5.9	6.6	7.6	8.3	9.2	12.2	13.4	15.4	18.4	21.5
1	1.2	1.4	1.6	2	2.4	2.6	3	3.2	4	5	6

Nominal Diameter
d

(Φ14)

Φ16

(Φ18)

Φ20

(Φ22)

Φ24

(Φ27)

Φ30

(Φ33)

Φ36

(Φ39)

d	min=nominal size
d	max
n	min
h	min
d_c	max
H	(≈2h)

14.2	16.2	18.2	20.2	22.5	24.5	27.5	30.5	33.5	36.5	39.5
14.8	17	19	21	23.5	25.5	28.7	31.7	34.9	37.9	40.9
4.7	5.2	5.7	6.1	6.8	7.1	7.9	8.7	9.5	10.2	10.7
3.5	4	4.6	5.1	5.6	5.9	6.8	7.5	8.2	9	9.5
24.5	28	31	33.8	37.7	40.3	45.3	49.9	54.7	59.1	63.1
7	8	9.2	10.2	11.2	11.8	13.6	15	16.4	18	19

Alternative history

JIS B 1251 - 2001 JIS B 1251 - 2018

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Similar Standards

1	[GB] GB /T 93 - 1987	Single Coil Spring Lock Washers, Normal Type View Suppliers
2	[GB] GB 93 - 1976	Single coil spring lock washers,Normal type View Suppliers
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6	[DIN] DIN 127 (B) - 1987	Spring Lock Washers, With Square Ends -B type
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42	[CNS] CNS 4255 - 1978	Spring Lock Washers With Safety Ring
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