s - size of the hexagon
e - the diameter of the circumscribed circle (not less than)
m - height of the nut
d - the nominal diameter of the thread
de - diameter of the crown
w - nut height at the crown

Dimensions of Hex thin slotted and castle nuts-coarse and fine pitch thread

d Coarse Thread	d Fine Thread		e	m	s	w
M 8			14.38	6.5	13	3.2
M 10	M 10x1		18.90	8	17	3.7
M 12	M 12x1.5		21.10	10	19	4.7
M 14	M 14x1.5		24.49	11	22	5.7
M 16	M 16x1.5		26.75	13	24	6.64
M 18	M 18x2	M 18x1.5	29.56	15	27	8.64
M 20	M 20x2	M 20x1.5	32.95	16	30	9.64
M 22	M 22x2	M 22x1.5	37.29	18	34	9.64
M 24	M 24x2	M 24x1.5	39.55	19	36	10.57
M 27	M 27.2	M 27x1.5	42.20	22	41	13.50
M 30	M 30x2	M 30x1.5	50.85	24	46	14.57
M 33	M 33x2	M 33x1.5	55.37	26	50	16.57
M 36	M 36x3	M 36x1.5	60.79	29	55	19.48
M 39	M 39x3	M 39x1.5	66.44	31	60	21.48
M 42	M 42x3	M 42x1.5	71.30	33	65	21.48
M 45		M 45x1.5	76.95	34	70	22.02
M 48	M 48x3	M 48x1.5	82.60	36	75	23.48
M 52	M 52x3	M 52x1.5 M 52x2	88.25	38	80	25.48