Dimensions for UNI 5731 Mushroom head square neck bolts

Thread d	p	b			dk		ds		f		k		r1	r2	r3	v
		l ? 125mm	125 < l ? 200mm	l > 200mm	max	min	max	min	max	min	max	min	approx	max	max	max	min
M5	0.8	16	22	-	13.55	12.45	5	4.52	4.1	2.9	3.3	2.7	10.7	0.5	0.75	5.48	4.52
M6	1	18	24	-	16.55	15.45	6	5.52	4.6	3.4	3.88	3.12	12.6	0.5	0.9	6.48	5.52
M8	1.25	22	28	41	20.65	19.35	8	7.42	5.6	4.4	4.88	4.12	16	0.5	1.2	8.58	7.42
M10	1.5	26	32	45	24.65	23.35	10	9.42	6.6	5.4	5.38	4.62	19.2	0.5	1.5	10.58	9.42
M12	1.75	30	36	49	30.65	29.35	12	11.3	8.75	7.25	6.95	6.05	24.1	1	1.8	12.7	11.3
M16	2	38	44	57	38.8	37.2	16	15.3	12.9	11.1	8.95	8.05	29.3	1	2.4	16.7	15.3
M20	2.5	46	52	65	46.8	45.2	20	19.16	15.9	14.1	11.05	9.95	33.9	1	3	20.84	19.16