DIN 427 Set Screw with Partial Thread

The European standard DIN 427 covers the headless set screw — a metal rod with a partial metric thread. It is a dowel-type screw used for secure positioning of metal parts relative to one another, preventing lateral displacement. The screw has a flat end on one side, while the other end has a slot for driving with a flat-blade screwdriver.

Application features and materials

The set screw is designed for joining components of machines and mechanisms, as well as for fastening building structures. Since it has no head, the pin sits fully inside the hole and does not protrude above the surface. The short threaded section provides secure retention of the part in the hole.

Materials:

• Steel grades 5.8, 14H — for applications without high strength requirements.
• Zinc-plated steel, applied by electroplating, — for long-term corrosion resistance.
• Stainless steel grades A2 and A4 — for fasteners installed in highly corrosive environments.
• Non-ferrous metals and their alloys: brass fasteners are inexpensive and long-lasting.
• Polymer materials, resistant to corrosion and decay.

Ordering fasteners

DIN 427 fasteners are used in mechanical engineering, construction, production of household products and other industries.

Dimensions of set screws (threaded dowel pins) DIN 427, mm:

b	3.6	4.8	6	7.2	9.6	12
n	0.4	0.6	0.8	1	1.2	1.6
t min	0.8	1.12	1.28	1.6	2	2.4
t max.	1.05	1.42	1.63	2	2.5	3
l	d
	M3	M4	M5	M6	M8	M10
6
8
10
12
16
20
25
30
35
40
45