PROFESSIONAL flat counterbore for CORE hole M4 PRO.36904

Thread - M4

Ø head - 8mm

Ø shank - 5mm

Ø pin - 3.3mm

HSS-Co 5% DIN 373

• CORE hole - the guide pin of the countersink fits only in threaded core holes
  
• Flat counterbore with spiral fluted cutting edges and a countersink angle of 180°
• The pin diameter is adapted to the respective application
• The thread-hole is cut after the sinking operation
• For countersinking hexagon screws according to DIN 912, 6912, 7984 and cylindrical screws with slot according to ISO 1207 (DIN 84)

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