DIN 964 Specifications – Slotted Raised Countersunk Head Screws : Fuller Fasteners

Thread Size d		M1	M1.2	M1.4	M1.6
P	Pitch	0.25	0.25	0.3	0.35
a	max	0.5	0.5	0.6	0.7
d_k	max=nominal size	1.9	2.3	2.6	3
d_k	min	1.76	2.06	2.46	2.86
f	≈	0.25	0.3	0.35	0.4
k	max	0.6	0.72	0.84	0.96
n	nominal size	0.25	0.3	0.3	0.4
	max	0.45	0.5	0.5	0.6
	min	0.31	0.36	0.36	0.46
r	max	0.1	0.12	0.14	0.16
R	≈	2	2.5	3	3
t	max	0.5	0.6	0.65	0.8
t	min	0.4	0.5	0.52	0.65
x	max	-	-	-	0.9
Length of Thread b		¹)	¹)	¹)	15
¹)only with thread up to the head

Thread Size d		M2	M2.5	M3
P	Pitch	0.4	0.45	0.5
a	max	0.8	0.9	1
d_k	max=nominal size	3.8	4.7	5.6
d_k	min	3.5	4.4	5.3
f	≈	0.5	0.6	0.75
k	max	1.2	1.5	1.65
n	nominal size	0.5	0.6	0.8
	max	0.7	0.8	1
	min	0.56	0.66	0.86
r	max	0.2	0.25	0.3
R	≈	4	5	6
t	max	1	1.2	1.45
t	min	0.8	1	1.2
x	max	1	1.1	1.25
Length of Thread b		16	18	19

Thread Size d		(M3.5)	M4	M5
P	Pitch	0.6	0.7	0.8
a	max	1.2	1.4	1.6
d_k	max=nominal size	6.5	7.5	9.2
d_k	min	6.14	7.14	8.84
f	≈	0.9	1	1.25
k	max	1.93	2.2	2.5
n	nominal size	0.8	1	1.2
	max	1	1.2	1.51
	min	0.86	1.06	1.26
r	max	0.35	0.4	0.5
R	≈	7	8	10
t	max	1.7	1.9	2.3
t	min	1.4	1.6	2
x	max	1.5	1.75	2
Length of Thread b		20	22	25

Thread Size d		M6	M8	M10
P	Pitch	1	1.25	1.5
a	max	2	2.5	3
d_k	max=nominal size	11	14.5	18
d_k	min	10.57	14.07	17.5
f	≈	1.5	2	2.5
k	max	3	4	5
n	nominal size	1.6	2	2.5
	max	1.91	2.31	2.81
	min	1.66	2.06	2.56
r	max	0.6	0.8	1
R	≈	12	16	20
t	max	2.8	3.7	4.6
t	min	2.4	3.2	4
x	max	2.5	3.2	3.8
Length of Thread b		28	34	40