DIN 553 Slotted Set Screw with Cone Point

The German standard DIN 553 covers headless set screws with a pointed cone end. These fasteners are installed into prepared threaded holes and, once screwed in, provide secure fixation of metal parts, preventing their axial displacement.

The fasteners prevent parts from separating or shifting even under constant dynamic or vibration loads. Equivalents are manufactured to the Russian standard GOST 1476 and the international standard ISO 7434.

Design and application features

Set screws manufactured to DIN 553 are a metal rod without a head. One end face has a straight slot for driving the screw with a screwdriver or power tool. The other end is pointed for convenient installation into a pre-prepared threaded hole. Metric thread runs along the entire rod, providing a secure connection of components in assemblies and mechanisms.

The design of the screws provides convenient installation for joining two parts. Since the screw has no head, it sinks completely into the hole and does not protrude above the surface. Its small size makes it a versatile solution for assembling various units. Screws of this type are widely used in mechanical engineering, machine tool building, automotive assembly, and other fields.

Set screws of this type are also used in construction and finishing works — for assembling metal frame elements, where they provide a secure connection that is invisible from the outside. They are used in furniture manufacturing: concealed installation of the screw does not disrupt the design concept or spoil the appearance of the finished furniture.

Materials

High-strength carbon steel 14H is used to manufacture fasteners of this type. To increase corrosion resistance, it is additionally treated with galvanic zinc plating, nickel, or chrome coating. A thin film of non-ferrous metal is applied to the surface, which counteracts contact with the external environment and prevents corrosion damage. At the same time, zinc-plated fasteners cost only slightly more than products without a protective coating.

Stainless steel grades A1, A2, A4 can also be used to manufacture the screws — acid-resistant materials reliably protected from corrosion. Fasteners of this type can be used in joints subject to constant contact with moisture — they are reliably protected from degradation. Fasteners can also be made of brass and other non-ferrous alloys, and in some cases, of plastic.

Order from FLOK

FLOK supplies set screws made of all material options in batches of any volume.

Size table:

n	0.25	0.4	0.4	0.6	0.8	1	1.2	1.6	2
dt	0.2	0.25	0.3	0.4	0.5	1.5	2	2.5	3
t min	0.64	0.72	0.8	1.12	1.28	1.6	2	2.4	2.8
t max.	0.84	0.95	1.05	1.42	1.63	2	2.5	3	3.6
l	d
	M2	M2.5	M3	M4	M5	M6	M8	M10	M12
4
5
6
8
10
12
16
18
20
25
30
35
40
45
50
60

d		M1	M1.2	M1.4	M1.6	M2	M2.5	M3	M3.5	M4	M5	M6	M8	M10	M12
n		0.2	0.2	0.2	0.25	0.25	0.4	0.4	0.5	0.6	0.8	1	1.2	1.6	2
t		0.4	0.4	0.48	0.56	0.64	0.72	0.8	0.96	1.12	1.28	1.6	2	2.4	2.8
dt		0.1	0.12	0.14	0.16	0.2	0.25	0.3	0.35	0.4	0.5	1.5	2	2.5	3
l	min.	2	2	2	2	3	3	3	4	4	5	5	8	10	20
	max.	4	4	5	3	12	12	20	16	30	25	40	50	60	80