Button Head Sockets (ISO 7380)

Nominal Screw Diameter and Thread Pitch	A		H		S	J	T
	Head Diameter		Head Height		Head Side Height	Hexagon Socket Size	Key Engagement
	Min.	Max.	Min.	Max.	Ref.	Nom.	Min.
M3 x 0.5	5.40	5.70	1.43	1.65	0.38	2.0	1.04
M4 x 0.7	7.24	7.60	1.95	2.20	0.38	2.5	1.30
M5 x 0.8	9.14	9.50	2.50	2.75	0.50	3.0	1.56
M6 x 1	10.07	10.50	3.00	3.30	0.80	4.0	2.08
M8 x 1.25	13.57	14.00	4.05	4.40	0.80	5.0	2.60
M10 x 1.5	17.07	17.50	5.20	5.50	0.80	6.0	3.12
M12 x 1.75	20.48	21.00	6.24	660	0.80	8.0	4.16
M16 x 2	27.48	28.00	8.44	8.80	1.5	10.0	5.20

Nominal Screw Diameter and Thread Pitch	G	B		E	F	L
	Wall Thickness	Under Head Fillet				Maximum Standard Length
	Wall Thickness	Transition Diameter		Transition Length	Juncture Radius	Maximum Standard Length
	Min.	Min.	Max.	Max.	Min.	Nom
M3 x 0.5	0.20	3.2	3.6	0.51	0.10	12
M4 x 0.7	0.30	4.4	4.7	0.60	0.20	20
M5 x 0.8	0.38	5.4	5.7	0.60	0.20	30
M6 x 1	0.74	6.5	6.8	0.68	0.25	30
M8 x 1.25	1.05	8.8	9.2	1.02	0.40	40
M10 x 1.5	1.45	10.8	11.2	1.02	0.40	40
M12 x 1.75	1.63	13.2	14.2	1.87	0.60	60
M16 x 2	2.25	17.2	18.2	1.87	0.60	60