Machine Screws

Self Drilling Screws | Hex Head Self Drilling Screw Sizes | Manufacturer and Supplier

SELF DRILLING SCREW - HEX TYPE

Description:

Hex head self-drilling screws from ITA Fasteners are engineered to be corrosion resistant and come in various sizes and materials. Depending on the size, the applications of the hex self-drilling screws can vary - the smaller screws are used in applications like fixing thin gauge metals and fixing metal to wood. The larger screws are used in roofing and other industries which require self-drilling through tough metals. Our screws come in stainless steel, alloy steel, carbon steel and other materials which prevents corrosion.

If the hex head self-drilling screws are used in extremely hard materials, it is advised to use it after a pilot hole has been drilled. Our screws are case hardened and heat-treated for applications requiring fastening of soft materials on hard ones. With a lower installation torque, the threads on these screws allow for a quick transition from drilling to tapping. For effective penetration, make sure that at least three threads of the fastener are inside the material.

Dimensional Standards:

DIN 7504 K

Size range:

Metric: As per requirements
Inches: As per requirements

Hex Head Self Drilling Screw Dimensions

Dimensions of DIN 7504K drilling screw hex

DIN 7504 K - Drilling screws hex

Equivalent norms: UNI 8117 K;

Legend:
l - length of bolt
d - the nominal diameter of the thread
e - the diameter of the circumscribed circle (not less than)
s - size hex head turnkey
Makings:
Steel: ISO 10666
Stainless: A2
Plastic: -
Non Ferrous: -
Thread: thread ISO 1478
dimensions in mm
Notes: -

Table according to ISO 15480:
Screw thread d			ST3,5	(ST3,9)	ST4,2	ST4,8	ST5,5	ST6,3
c	min.		0,6	0,6	0,9	0,9	1	1
dc	max.		8,3	8,3	8,8	10,5	11	13,2
dc	min.		7,6	7,6	8,2	9,8	10	12,2
f	approx.		0,4	0,4	0,4	0,5	0,5	0,5
e	min.		5,96	5,96	7,59	8,71	8,71	10,95
k	max.		3,45	3,45	4,25	4,45	5,45	6,45
k	min.		3,2	3,2	4	4,15	5,15	6,15
k´	min.		1,55	1,55	1,9	2	2,7	3,3
r	max.		0,5	0,5	0,6	0,7	0,8	0,9
s	nominal=max.		5,5	5,5	7	8	8	10
s	min.		5,32	5,32	6,78	7,78	7,78	9,78
t	min.		1	1	1,2	1,4	1,6	1,8
t	max.		1,4	1,4	1,6	1,8	2	2,2
Drilling range	from		0,7	0,7	1,75	1,75	1,75	2
Drilling range	to		2,25	2,4	3	4,4	5,25	6
dp	max.		2,8	3,1	3,6	4,1	4,8	5,8
l			lg
Nominal	min.	max.	min.
9,5	8,75	10,25	2,85
13	12,1	13,9	6,2	5,8	4,3	4,7
16	15,1	16,9	9,2	8,8	7,3	5,8	5
19	18	20	12,1	11,7	10,3	8,7	8	7
22	21	23	15,1	14,7	13,3	11,7	11	10
25	24	26	18,1	17,7	16,3	14,7	14	13
32	30,75	33,25		24,5	23	21,5	21	20
38	36,75	39,25		30,5	29	27,5	27	26
45	43,75	46,25				34,5	34	33
50	48,75	51,25				39,5	39	38