Knauf Sheet metal screws LB with fine thread for connecting sheet steel profiles - profile screws, drywall screws, self-tapping, 3.5 mm x 9.5 mm including 1 x bit (1000 pieces) : Amazon.de: DIY & Tools
Schäfer + Peters | DIN 7981 A2 C 3,9X19 Z | Competence in Stainless Steel