FORMAT Counterbore FINE DIN373 HSS through hole cylinder shank M4

180° counterbore with cyl. shank, for through hole, fine quality grade

Design: Spiral fluted with fixed pilot.

Application: For countersinking inner hexagon screws DIN 912, DIN 6912 and DIN 7984 as well as cylinder screws DIN 84 (ISO 1207). Ideal for burr-free and chatter-free sinking of steel, cast iron and light metals.