DIN 938 Threaded Stud

The DIN 938 GOST 22033 double-end threaded stud is a cylindrical metal rod with threads on both ends. The thread is cut partially; the middle of the rod has a smooth shank. The threaded portion equals one diameter of the stud. The threaded stud is used to join structural elements — in machine tools, instruments, machines and other mechanisms — when it is not possible to fit a bolt head, or when one of the components being joined has significant thickness and drilling a deep hole for the full length of a bolt is impractical. Using a threaded stud also reduces the overall weight of the structure.

DIN 938 Threaded Stud

The 1d stud GOST 22033 is installed together with nuts and washers.

The seating end of the threaded stud is installed into the threaded hole of one component. The second component is fitted onto the opposite, clamping end, after which a washer and nut are installed. This secures the assembly reliably.

Materials

Threaded studs with a screw-in end are most often made from carbon steel with a zinc-plated coating, property classes 5.6 / 5.8 / 8.8 / 10.9. For dynamic, static or vibrational loads, high-alloy steel is used. In addition to standard steels, studs are also produced from austenitic stainless steel grade A2 and acid-resistant stainless steel grade A4: this steel prevents oxidation and protects against atmospheric exposure, and a stainless steel stud does not conduct electricity and has no magnetic properties. A threaded stud made of alloy steel with a chrome coating has the same properties. FLOK supplies chrome-plated threaded studs directly from the manufacturer.

Studs are also made from brass — a copper alloy. Brass threaded studs are non-magnetic, do not conduct electricity, and are non-toxic. They are used for installing electrical panels and units.

Size table

Main dimensions of the stud, in mm.

Nuts and washers are selected based on the diameter of the stud’s seating end. The nut is installed on the seating end until it contacts the component, with the washer placed between the nut and the component. The diameter is selected according to the table below.