ISO 4032 Hexagon regular nuts – Basic dimensions

Selected sizes used for CE Marking under EN 15048

Dimension (d)	M12	M16	M20	M22	M24	M27	M30	M33	M36
Thread pitch (pa)	1.75	2	2.5	2.5	3	3	3.5	3.5	4
m	10.37-10.8	14.1-14.8	16.9-18.0	18.1-19.4	20.2-21.5	22.5-23.8	24.3-25.6	27.4-28.7	29.4-31.0
dw (min)	16.6	22.5	27.7	31.4	33.3	38.0	42.8	46.6	51.1
s	17.73-18.00	23.67-24.00	29.16-30.00	33.00-34.00	35.00-36.00	40.00-41.00	45.00-46.00	49.00-50.00	53.80-55.00
e (min)	20.03	26.75	32.95	37.29	39.55	45.20	50.85	55.37	60.79

Dimensions in milimeters