Attention: The DIN 961 standard is officially declared obsolete and replaced by the current regulation DIN EN ISO 8676:2011-07.
Technical specifications of DIN 961 bolts
This standard establishes geometric parameters and tolerances for high-strength hexagon head bolts equipped with a full fine metric thread. The products are manufactured according to precision classes A and B. Technical specifications provide for a nominal thread diameter in the range from M8 to M64 with a pitch of 1 to 4 mm and a shank length from 16 to 500 mm.
Bolts corresponding to the requirements of DIN 961 (analogous to ISO 8676) are in demand in heavy mechanical engineering, during the assembly of critical metal structures, and in the oil and gas sector. The use of a fine thread pitch provides increased vibration resistance and adjustment precision when tightening connections.
Operational parameters and materials
Products in this category are produced with strength classes 4.8, 5.8, 8.8, 10.9, and 12.9, which allows EV Group China engineers to select fasteners for specific design loads. Available material finish options:
- Carbon steels with protective coating (electro-galvanizing to prevent corrosion).
- Corrosion-resistant austenitic steels of grades A2 and A4 for aggressive environments.