similar to ISO 4014 | DIN standard has been withdrawn
DIN 931 | steel | 8.8 | zinc-plated, thick-film passivated (VZD) | Cr(VI)-free | metric thread | screws can be paired with a 6h tolerance-compliant female thread
Note: similar to ISO 4014 | DIN-standards has been withdrawn
Surface (VZD): galvanized, thick-film passivated, min. 5μm | corrosion resistance to DIN EN ISO 9227 *: white rust 72h, red rust 144h | defined coefficient of friction μ(total) = 0.12 - 0.18 for high-strength screws (≥ 8.8)
>*The verification of the mentioned minimum requirements is carried out according to the test conditions of ISO/CD 4042:2016, galvanic coatings for fasteners. For dimensions < M5, the above values may deviate downwards.
This standard specifies the characteristics of hexagon head bolts of product grade A and B:
Product grade A = For threads M1,6 to M24 and nominal lengths ≤ 10d or 150 mm, whichever is the shorter
Product grade B = For threads over M24 or nominal lengths > 10d or 150 mm, whichever is the shorter.
Information about the product class can be found in the technical details of the selected article.