DIN 912 Screw (Bolt)

The German standard DIN 912 covers a bolt with partial metric thread and a cylinder-shaped head. This is a universal type of fastener: it is used to create strong threaded connections for wood, metal, plastic and other materials.

The bolt head is fitted with an internal hex socket: it is tightened with a special hex key tool that provides high tightening torque. The metal shank carries coarse or fine metric thread, with diameters ranging from M1.4 to M72.

Design features of the DIN 912 screw

The screw made to the DIN 912 standard is manufactured from durable materials and has high resistance to static and dynamic loads. The cylinder-shaped head is designed to be tightened not with a standard wrench but with a hex key. Such a connection is stronger and harder to disassemble, which is why this type of fastener is used in connections that require protection against unauthorized access.

Exact equivalents of this fastener type are manufactured to the Russian standard GOST 11738 and the international standard ISO 4762. Minor discrepancies are allowed between standardization systems, so when selecting an exact equivalent it is worth checking the parameters beforehand.

The screw is designed for installation into a prepared hole: it is screwed into a tapped internal thread or secured with a nut. Washers may additionally be used during fastening to increase the contact area on the material and prevent damage to it. The wide range of available lengths allows a suitable solution to be selected for different tasks.

Materials used to manufacture the fastener products

Fasteners made of steel with property class 8.8, 10.9 or 12.9 are widely used. The latter two options are high-strength fasteners designed for use under heavy static and dynamic loads, including vibration. Screws of this type are used in the assembly of critical connections in units and assemblies: they are protected against premature failure and spontaneous loosening.

The steel is coated with zinc – a reliable and inexpensive method of corrosion protection. A thin zinc film is applied to the metal surface by electroplating: it barely adds to the weight of the fastener while protecting the metal from contact with aggressive environments. Zinc plating extends service life by providing an additional protective layer.

For conditions of increased corrosion activity, screws made of stainless steel A2 and A4 are suitable. Additional elements in the composition of stainless steel provide enhanced corrosion resistance. Fasteners made of it have an unlimited service life even under harsh conditions.

Applications of DIN 912 screws

DIN 912 screws are designed to create strong threaded connections between parts made of different materials. Such fastener products are widely used in industry: in the assembly of machines, mechanisms and units in machine-tool building, mechanical engineering, automotive manufacturing and other sectors.

Another field of application is furniture production. Screws are used to join components of case furniture: assembly with a hex key ensures high strength and reliability of the joint. The hex socket in the head, instead of a traditional slot, makes the connection harder to disassemble, which reduces the risk of unauthorized interference with the structure.

Fasteners of this type are also used in construction. High-strength screws are used in the assembly of metal frames and other structures — zinc-plated fasteners with corrosion protection are used for this purpose. Stainless steel fasteners with an unlimited service life, suitable for outdoor structures, are also used in construction.

Ordering DIN 912 screws from FLOK

FLOK supplies fastener products to businesses and individuals; orders can be placed for both retail and wholesale quantities. DIN 912 screws are available for supply according to the required property class, coating and length range.