BS 4168 Hexagon Socket Set Screws

Nom. Size, d	Pitch, P	Socket Size, _s	Depth of Key Engagement, t^a		Range of Popular Lengths				Length of Dog on Dog Point Screws^b				_b	End Diameters
		Socket Size, _s	Depth of Key Engagement, t^a		Flat Point	Cone Point	Dog Point	Cup Point	Short Dog, z		Long Dog, z			Flat Point, d_z	Cone Point d_t	Dog Point, d_p	Cup Point, d_z
		nom	min	min	l	l	l	l	min	max	min	max		max	max	max	max
BS 4168 - M1.6	0.35	0.7	0.7	1.5	2-8	2-8	2-8	2-8	0.4	0.65	0.8	1.05	2.5	0.8	0	0.8	0.8
BS 4168 - M2	0.4	0.9	0.8	1.7	2-10	2-10	2.5-10	2-10	0.5	0.75	1	1.25	3	1	0	1	1
BS 4168 - M2.5	0.45	1.3	1.2	2	2-12	2.5-12	3-12	2-12	0.63	0.88	1.25	1.5	4	1.5	0	1.5	1.2
BS 4168 - M3	0.5	1.5	1.2	2	2-16	2.5-16	4-16	2.5-16	0.75	1	1.5	1.75	5	2	0	2	1.4
BS 4168 - M4	0.7	2	1.5	2.5	2.5-20	3-20	5-20	3-20	1	1.25	2	2.25	6	2.5	0	2.5	2
BS 4168 - M5	0.8	2.5	2	3	3-25	4-25	6-25	4-25	1.25	1.5	2.5	2.75	6	3.5	0	3.5	2.5
BS 4168 - M6	1	3	2	3.5	4-30	5-30	8-30	5-30	1.5	1.75	3	3.25	8	4	1.5	4	3
BS 4168 - M8	1.25	4	3	5	5-40	6-40	8-40	6-40	2	2.25	4	4.3	10	5.5	2	5.5	5
BS 4168 - M10	1.5	5	4	6	6-50	8-50	10-50	8-50	2.5	2.75	5	5.3	12	7	2.5	7	6
BS 4168 - M12	1.75	6	4.8	8	8-60	10-60	12-60	10-60	3	3.25	6	6.3	16	8.5	3	8.5	8
BS 4168 - M16	2	8	6.4	10	10-60	12-60	16-60	12-60	4	4.3	8	8.36	20	12	4	12	10
BS 4168 - M20	2.5	10	8	12	12-60	16-60	20-60	16-60	5	5.3	10	10.36	25	15	5	15	14
BS 4168 - M24	3	12	10	15	16-60	20-60	25-60	20-60	6	6.3	12	12.43	30	18	6	18	16
a The smaller of the two t min. values applies to certain short-length set screws. These short-length screws are those whose length is approximately equal to the diameter of the screw. The larger t min. values apply to longer-length screws. b A dog point set screw having a nominal length equal to or less than the length shown in the () column of the table is supplied with length z shown in the short dog column. For set screws of lengths greater than shown in the () column, z for long dogs applies. All dimensions are in millimeters. For dimensional notation