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(Non-preferred) dimensions in parentheses.

Conical Spring Lock Washers - Type 1【Table 6/Table 7】CW/1L，1H

JIS B 1251 (CW/1L、1H) - 2018

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^*Models with different eras.

Nominal Diameter
d

Φ3

Φ4

(Φ4.5)

Φ5

Φ6

Φ8

Φ10

Φ12

d	min=nominal size
	max
d_c	max=nominal size
	min
h	Light	nominal size
		max
		min
	Heavy	nominal size
		max
		min
H	Light
	Heavy

3.2	4.3	4.8	5.3	6.4	8.4	10.5	13
3.4	4.5	5	5.5	6.65	8.65	10.8	13.3
7	9	10	10	12.5	17	21	24
6.75	8.75	9.75	9.75	12.2	16.7	20.6	23.6
0.5	0.7	0.8	0.8	1	1.4	1.8	2.2
0.535	0.745	0.85	0.85	1.055	1.47	1.885	2.3
0.465	0.655	0.75	0.75	0.945	1.33	1.715	2.1
/	/	/	/	1.2	1.8	2.2	2.5
/	/	/	/	1.265	1.885	2.3	2.6
/	/	/	/	1.135	1.715	2.1	2.4
0.75	0.95	1.05	1.1	1.35	1.85	2.3	2.7
/	/	/	/	1.55	2.15	2.65	3.05

Nominal Diameter
d

(Φ14)

Φ16

(Φ18)

Φ20

(Φ22)

Φ24

(Φ27)

Φ30

d	min=nominal size
	max
d_c	max=nominal size
	min
h	Light	nominal size
		max
		min
	Heavy	nominal size
		max
		min
H	Light
	Heavy

15	17	19	21	23	25	28	31
15.3	17.3	19.35	21.35	23.35	25.35	28.35	31.4
28	30	34	37	39	44	50	56
27.6	29.6	33.5	36.5	38.5	43.5	49.5	55.3
2.5	2.8	3	3.5	3.5	4	4.5	5
2.6	2.9	3.11	3.61	3.61	4.11	4.64	5.14
2.4	2.7	2.89	3.39	3.39	3.89	4.36	4.86
3	3.5	4	4.5	5	/	/	/
3.11	3.61	4.11	4.64	5.14	/	/	/
2.89	3.39	3.89	4.36	4.86	/	/	/
3.15	3.5	3.9	4.4	4.7	5.2	5.9	6.6
3.65	4.1	4.64	5.2	5.65	/	/	/

Alternative history

JIS B 1251 - 2001 JIS B 1251 - 2018

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