DIN 7516 Self-Tapping Screw with Countersunk Head, Form D

Self-tapping steel screws with countersunk head are manufactured to the European standard DIN 7516. They are designed for installation into material without the use of nuts: the fastener cuts its own metric thread in the hole. Suitable for joining sheet materials, including metal, plastics, wood and others.

Form D features a countersunk head that sits completely flush within the material and does not protrude above the surface — this simplifies subsequent finishing of the structure.

Manufacturing and application features

Carbon steel is used for manufacturing, with the metal given an additional zinc coating to resist corrosion. Screws for highly corrosive conditions are made of stainless steel A2 and A4. Self-tapping screws can also be made of case-hardened steel. The closest equivalents are manufactured to the Russian standard GOST 10619-80.

These fasteners have the following characteristics:

• Nominal thread diameter ranges from M3 to M8.
• The raised countersunk head diameter of the screw is from 5.6 to 14.5 mm.
• Maximum shank length is from 6 to 50 mm.
• Head height does not exceed 2 mm.

Fasteners of this type are in demand in construction, used for fastening sheet metal and for assembling loaded metal structures.

How to order fastener products

FLOK supplies fasteners and hardware: the catalogue features a wide selection of product sizes, and wholesale orders can be placed online. Products are sold in small and large lots, with shipping to any region of Russia.