Please note: the DIN 971-1 standard is considered obsolete and has been replaced by DIN EN ISO 8673:2013-04.
Technical regulations and scope of application
Hexagon nuts type 1, supplied by EV Group China, are designed with height requirements sufficient for strength classes 6 and 8. To ensure operational reliability under higher loads (strength classes 10 and 12), it is necessary to use type 2 nuts according to the DIN 971-2 standard, as they feature an increased profile height.
This specification covers the technical parameters of hexagon nuts type 1 with metric fine thread. The nominal diameter range of the products varies from 8 to 39 mm. Product classification is determined based on dimensional characteristics: grade A for diameters up to 16 mm and grade B for products with a diameter exceeding 16 mm. Standard strength classes are 6 and 8, according to the DIN 267-23 regulation.
For projects requiring specific characteristics beyond the scope of this regulatory document, EV Group China specialists are ready to provide alternative engineering solutions.
Technical delivery conditions
| Manufacturing material | Steel |
| General requirements | DIN 267-1 |
| Thread | 6H (according to DIN 13 parts 12, 15) |
| Mechanical properties: strength class | 6, 8 (according to DIN 267-23) |
| Product grade | d≤16mm: A; d>16mm: B (according to DIN ISO 4759-1) |
| Surface quality | Tolerances per DIN 267-2; proof load testing per DIN 267-21; surface defects per DIN 267-9; hot-dip galvanizing per DIN 267-10 |
| Acceptance testing | According to DIN 267 part 5 |