Washers (mm)

Size ¹ ²	Style	ID	OD	Thickness
M1.6	Narrow	2.09	4.00	0.70
M1.6	Regular	2.09	5.00	0.70
M1.6	Wide	2.09	6.00	0.90
M2	Narrow	2.64	5.00	0.90
M2	Regular	2.64	6.00	0.90
M2	Wide	2.64	8.00	0.90
M2.5	Narrow	3.14	6.00	0.90
M2.5	Regular	3.14	8.00	0.90
M2.5	Wide	3.14	10.00	1.20
M3	Narrow	3.68	7.00	0.90
M3	Regular	3.68	10.00	1.20
M3	Wide	3.68	12.00	1.40
M3.5	Narrow	4.18	9.00	1.20
M3.5	Regular	4.18	10.00	1.40
M3.5	Wide	4.18	15.00	1.75
M4	Narrow	4.88	10.00	1.20
M4	Regular	4.88	12.00	1.40
M4	Wide	4.88	16.00	2.30
M5	Narrow	5.78	11.00	1.40
M5	Regular	5.78	15.00	1.75
M5	Wide	5.78	20.00	2.30
M6	Narrow	6.87	13.00	1.75
M6	Regular	6.87	18.80	1.75
M6	Wide	6.87	25.40	2.30
M8	Narrow	9.12	18.80	2.30
M8	Regular	9.12	25.40	2.30
M8	Wide	9.12	32.00	2.80
M10	Narrow	11.12	20.00	1.60
M10	Regular	11.12	28.00	2.80
M10	Wide	11.12	39.00	3.50
M12	Narrow	13.57	25.40	2.00
M12	Regular	13.57	34.00	3.50
M12	Wide	13.57	44.00	3.50
M16	Narrow	17.52	32.00	2.50
M16	Regular	17.52	44.00	4.00
M16	Wide	17.52	56.00	4.60
M20	Narrow	22.32	39.00	3.00
M20	Regular	22.32	50.00	4.60
M20	Wide	22.32	66.00	5.10
M24	Narrow	26.12	44.00	3.50
M24	Regular	26.12	56.00	5.10
M24	Wide	26.12	72.00	5.60
M30	Narrow	33.02	56.00	4.00
M30	Regular	33.02	72.00	5.60
M30	Wide	33.02	90.00	6.40
M36	Narrow	38.92	66.00	4.50
M36	Regular	38.92	90.00	6.40
M36	Wide	38.92	110.00	8.50

Dimensions per ASME B18.22M-1981 (R2000) in millimeters. ↩
Oberg, Jones, Horton, Ryffel, McCauley. (2020). Machinery’s Handbook 31 Digital Edition. https://ebooks.industrialpress.com/pdfreader/machinerys-handbook-digital-edition-31st ↩

Footnotes