Dimensions of ASME B18.2.4.6M Metric Heavy Hex Nuts

Nominal Nut Diameter and Thread Pitch	Width Across Flats, S		Width Across Corners, E		Thickness M		Bearing Face Diameter, Dw, Min	Washer Face Thickness, C
	Max	Min	Max	Min	Max	Min		Max	Min
M12 x 1.75	21.00	20.16	24.25	22.78	12.3	11.9	19.2	0.8	0.4
M14 x 2	24.00	23.16	27.71	26.17	14.3	13.6	22.0	0.8	0.4
M16 x 2	27.00	26.16	31.18	29.56	17.1	16.4	24.9	0.8	0.4
M20 x 2.5	34.00	33.00	39.26	37.29	20.7	19.4	31.4	0.8	0.4
M22 x 2.5	36.00	35.00	41.57	39.55	23.6	22.3	33.3	0.8	0.4
M24 x 3	41.00	40.00	47.34	45.20	24.2	22.9	38.0	0.8	0.4
M27 x 3	46.00	45.00	53.12	50.85	27.6	26.3	42.8	0.8	0.4
M30 x 3.5	50.00	49.00	57.74	55.37	30.7	29.1	46.6	0.8	0.4
M36 x 4	60.00	58.80	69.28	66.44	36.6	35.0	55.9	0.8	0.4
M42 x 4.5	70.00	67.90	80.83	77.41	42.0	40.4	64.5	1.0	0.5
M48 x 5	80.00	77.60	92.38	88.46	48.0	46.4	73.7	1.0	0.5
M56 x 5.5	90.00	87.20	103.92	99.41	56.0	54.1	82.8	1.0	0.5
M64 x 6	100.00	96.80	115.47	110.35	64.0	62.1	92.0	1.0	0.5
M72 x 6	110.00	106.40	127.02	121.30	72.0	70.0	101.1	1.2	0.6
M80 x 6	120.00	116.00	138.56	132.24	80.0	78.1	110.2	1.2	0.6
M90 x 56	135.00	130.50	155.88	148.77	90.0	87.8	124.0	1.2	0.6
M100 x 6	150.00	145.00	173.21	165.30	100.0	97.8	137.8	1.2	0.6

• This size with width across flat of 15mm is not standard. Unless specifically ordered, M10 hex jam nuts with 16 mm width across flats will be furnished
• All dimensions are in millimeters.