DIN 920 Screw with Reduced Cylinder Head and Slot

DIN 920 covers a screw with a reduced-diameter cylinder head and a slot for driving with a flat-blade screwdriver. This is a widely used fastener type: a strong metal shank with full metric thread with diameter from M1 to M10. The reduced head size makes the fastener less visible on the material surface and improves the decorative qualities of the joint.

This product type has no equivalent in the Russian GOST standardization system.

Manufacturing and application features

The DIN 920 screw is designed for threaded joints of metal parts in various machines and mechanisms. It is installed into a hole with pre-tapped thread or without thread — in the latter case it is secured with a nut, with or without a washer. The overall length of the product can range from 4 to 25 mm.

The main material is steel with property class 5.8. Products of this type have standard strength and are not used for assembling critical, high-load joints. For increased corrosion resistance, they may have a protective zinc coating applied by electroplating. For use in conditions with possible contact with moisture, fasteners made of stainless steel A2 or A4 are used.

DIN 920 fastening screws are used in mechanical engineering, furniture production, in the assembly of instruments, machine tools and industrial equipment, in electronic equipment, and in construction work.

Ordering fastener products from FLOK

FLOK supplies fastener products in wholesale and retail lots of any size. The range includes products from Russian and foreign suppliers, manufactured in strict compliance with standards. Orders can be placed online.

FLOK also provides ongoing supply to stores, construction companies and other organizations.

Dimensions of DIN 920 reduced cylinder head screws in mm:

d	M1.6	M2	M2.5	M3	M3.5	M4	M5	M6	M8	M10
b	5	6	7.5	9	10	12	15	18	24	30
dk	2.3	2.8	3.5	4	4.5	5.5	6.5	8	10	13
k	1	1.2	1.5	1.8	2	2.4	2.7	3.1	3.8	4.6
n	0.3	0.3	0.4	0.5	0.5	0.6	0.8	1	1.2	1.6
t min	0.5	0.6	0.75	0.9	1	1.2	1.3	1.5	1.9	2.3
t max.	0.7	0.8	0.95	1.15	1.3	1.5	1.6	1.9	2.4	2.