Dimensions for UNI 6109 Slotted countersunk head screws

Thread d	p	a	b	dk		k	n			r	t		x
		max	min	nominal=max	min	max	nominal	max	min	max	min	max	max
M1	0.25	0.5	Full thread	1.9	1.76	0.6	0.25	0.31	0.45	0.1	0.2	0.3	-
M1.2	0.25	0.5	"	2.3	2.06	0.72	0.3	0.36	0.5	0.12	0.25	0.35	-
M1.4	0.3	0.6	"	2.6	2.46	0.86	0.3	0.36	0.5	0.14	0.28	0.4	-
M1.6	0.35	0.7	15	3	2.86	0.96	0.4	0.46	0.6	0.16	0.32	0.45	0.9
M2	0.4	0.8	16	3.8	3.5	1.2	0.5	0.56	0.7	0.2	0.4	0.6	1
M2.5	0.45	0.9	18	4.7	4.4	1.5	0.6	0.66	0.8	0.25	0.5	0.7	1.1
M3	0.5	1	19	5.6	5.3	1.65	0.8	0.86	1	0.3	0.6	0.85	1.25
M3.5	0.6	1.2	20	6.5	6.14	1.93	0.8	0.96	1	0.35	0.7	1	1.5
M4	0.7	1.4	22	7.5	7.14	2.2	1	1.06	1.2	0.4	0.8	1.1	1.75
M5	0.8	1.6	25	9.2	8.84	2.5	1.2	1.26	1.51	0.5	1	1.3	2
M6	1	2	28	11	10.57	3	1.6	1.66	1.91	0.6	1.2	1.6	2.5
M8	1.25	2.5	34	14.5	14.07	4	2	2.06	2.31	0.8	1.6	2.1	3.2
M10	1.5	3	40	18	17.57	5	2.5	2.56	2.81	1	2	2.6	3.8
M12	1.75	3.5	46	22	21.48	6	3	3.06	3.31	1.2	2.4	3	4.4
M14	2	4	52	25	24.48	7	3	3.06	3.31	1.4	2.8	3.5	5
M16	2	4	58	29	28.48	8	4	4.07	4.37	1.6	3.2	4	5
M18	2.5	5	64	33	32.38	9	4	4.07	4.37	1.8	3.6	4.5	6.3
M20	2.5	5	70	36	35.38	10	5	5.07	5.37	2	4	5	6.3