Very sturdy− step length to DIN 8376. Tight concentricity tolerances between drill and counterbore ⌀ guarantee exact alignment.
Application:
For screw through holes to DIN-ISO 273 and counterbores to DIN 74, sheet 2 form H, J, and K, medium version. For screws to DIN 912, 6912, and 7984, ISO 1207 (DIN 84).