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Metric Plain Washers (General Purpose)

ANSI B 18.22M - 1981 (R2010)

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Nominal Diameter

Φ1.6
N

Φ1.6
R

Φ1.6
W

Φ2
N

Φ2
R

Φ2
W

Φ2.5
N

Φ2.5
R

Φ2.5
W

Φ3
N

Φ3
R

Φ3
W

Φ3.5
N

Series ^①
d	max
	min
d_c	max
	min
h	max
	min

N	R	W	N	R	W	N	R	W	N	R	W	N
2.09	2.09	2.09	2.64	2.64	2.64	3.14	3.14	3.14	3.68	3.68	3.68	4.18
1.95	1.95	1.95	2.50	2.50	2.50	3.00	3.00	3.00	3.50	3.50	3.50	4.00
4	5	6	5	6	8	6	8	10	7	10	12	9
3.70	4.70	5.70	4.70	5.70	7.64	5.70	7.64	9.64	6.64	9.64	11.57	8.64
0.70	0.70	0.90	0.90	0.90	0.90	0.90	0.90	1.20	0.90	1.20	1.40	1.20
0.50	0.50	0.60	0.60	0.60	0.60	0.60	0.60	0.80	0.60	0.80	1.00	0.80

Nominal Diameter

Φ3.5
R

Φ3.5
W

Φ4
N

Φ4
R

Φ4
W

Φ5
N

Φ5
R

Φ5
W

Φ6
N

Φ6
R

Φ6
W

Φ8
N

Φ8
R

Series ^①
d	max
	min
d_c	max
	min
h	max
	min

R	W	N	R	W	N	R	W	N	R	W	N	R
4.18	4.18	4.88	4.88	4.88	5.78	5.78	5.78	6.87	6.87	6.87	9.12	9.12
4.00	4.00	4.70	4.70	4.70	5.60	5.60	5.60	6.65	6.65	6.65	8.90	8.90
10	15	10	12	16	11	15	20	13	18.8	25.4	18.8	25.4
9.64	14.57	9.64	11.57	15.57	10.57	14.57	19.48	12.57	18.28	24.88	18.28	24.88
1.40	1.75	1.20	1.40	2.30	1.40	1.75	2.30	1.75	1.75	2.30	2.30	2.30
1.00	1.20	0.80	1.00	1.60	1.00	1.20	1.60	1.20	1.20	1.60	1.60	1.60

Nominal Diameter

Φ8
W

Φ10
N

Φ10
R

Φ10
W

Φ12
N

Φ12
R

Φ12
W

Φ14
N

Φ14
R

Φ14
W

Φ16
N

Φ16
R

Φ16
W

Series ^①
d	max
	min
d_c	max
	min
h	max
	min

W	N	R	W	N	R	W	N	R	W	N	R	W
9.12	11.12	11.12	11.12	13.57	13.57	13.57	15.52	15.52	15.52	17.52	17.52	17.68
8.90	10.85	10.85	10.85	13.30	13.30	13.30	15.25	15.25	15.25	17.25	17.25	17.25
32	20	28	39	25.4	34	44	28	39	50	32	44	56
31.38	19.48	27.48	38.38	24.88	33.38	43.38	27.48	38.38	49.38	31.38	43.38	54.80
2.80	2.30	2.80	3.50	2.80	3.50	3.50	2.80	3.50	4.00	3.50	4.00	4.60
2.00	1.60	2.00	2.50	2.00	2.50	2.50	2.00	2.50	3.00	2.50	3.00	3.50

Nominal Diameter

Φ20
N

Φ20
R

Φ20
W

Φ24
N

Φ24
R

Φ24
W

Φ30
N

Φ30
R

Φ30
W

Φ36
N

Φ36
R

Φ36
W

Series ^①
d	max
	min
d_c	max
	min
h	max
	min

N	R	W	N	R	W	N	R	W	N	R	W
22.13	22.32	22.32	26.12	26.12	26.12	33.02	33.02	33.02	38.92	38.92	38.92
21.80	21.80	21.80	25.60	25.60	25.60	32.40	32.40	32.40	38.30	38.30	38.30
39	50	66	44	56	72	56	72	90	66	90	110
38.38	49.00	64.80	43.00	54.80	70.80	54.80	70.80	88.60	64.80	88.60	108.60
4.00	4.60	5.10	4.60	5.10	5.60	5.10	5.60	6.40	5.60	6.40	8.50
3.00	3.50	4.00	3.50	4.00	4.50	4.00	4.50	5.00	4.50	5.00	7.00

①,N：Narrow
R：Regular
W：Wide

Alternative history

ANSI B 18.22M - 1981(R2010) ANSI B 18.22M - 1981(R2017)

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