Technical specifications and application range of DIN 939 studs
DIN 939 is an international industrial standard governing the production of threaded studs with a screwing-in end (the length of the screwing-in part is 1.25d). Fasteners of this type are designed to create high-strength detachable connections in mechanical engineering, heavy industry, and metal structure assembly. EV Group China supplies studs that meet strict tolerances for thread precision and geometric stability.
Depending on the operating conditions, DIN 939 studs are manufactured from carbon steels with subsequent protective coating (galvanized zinc) or from corrosion-resistant grades (stainless steel A2, A4). The use of special alloys, such as brass, is permissible for instrumentation needs.
Classification and manufacturing materials
EV Group China offers DIN 939 studs classified by strength class and chemical composition of the material:
- Strength classes: 4.8, 5.8, 8.8, 10.9 for carbon steels.
- Stainless steels: Austenitic grades A2 (analogous to 08Kh18N10) and A4 (analogous to 10Kh17N13M2) for environments with increased chemical activity.
- Protective coating: Standard electrolytic galvanizing to improve anti-corrosion characteristics in atmospheric conditions.
- Alloys: Brass products for use in non-magnetic assemblies and high-humidity conditions.