DIN 923 Stepped Set Screw with Cylinder Head and Slot

DIN 923 covers a stepped pressure screw: a special fastener for secure joining of metal parts. Structurally it consists of three components: a threaded tip, an unthreaded cylindrical section, and a cylinder-shaped head with a straight slot for driving with a screwdriver or power tool.

The head ensures tight pressing of the metal part against the surface, while its increased diameter prevents it from deforming the metal.

Manufacturing and application features

DIN 923 screws have no equivalents in the Russian GOST system or the international ISO standard. These are fasteners from 3 to 20 mm in length, with thread diameter ranging from M3 to M8. No special equipment is required to install the screw — a simple hand tool can be used.

The stepped pressure screw is made of steel with property class 5.8, and is used in joints that are not subject to constant high loads. It can also be made from stainless steel A2 and A4 — such screws are used in conditions of increased humidity or chemical aggressiveness. The steel can be given an electroplated coating for protection against corrosion.

Screws of this type are used to create strong, quick-release joints, providing reliable pressing of parts together. They are used in instrument making, mechanical engineering and other industries, and can also be used in furniture manufacturing and construction. The head configuration reduces pressure on the surface during tight pressing, so the screws are suitable for use with thin sheet materials.

Terms of purchase from FLOK

FLOK supplies fastener products that meet standard requirements. One-off or recurring deliveries of any batch volume are possible.

Dimensions of DIN 923 set screws with cylinder head (stainless steel A2) in mm:

dk	7	8.5	11	13	16
k	1.8	2.4	2.7	3.1	3.8
n	0.8	1	1.2	1.6	2
b	4.5	6	7	9	11
l	d
	M3	M4	M5	M6	M8
3
4
5
6
8
10
12
16
20

d	M3	M4	M5	M6	M8	M10
dk	7	8.5	11	13	16	20
k	1.8	2.4	2.7	3.1	3.8	4.6
b	4.5	6	7	9	11	13.5
ds	4	5.5	7	8	10	13