RUKO FLS-DIN373-M-4 broca de furo de núcleo para parafusos cilíndricos M4 com sextavado interior

Counterbore for hexagon socket head cap screws, engineered to create a flat-bottomed recess with a pilot hole for M4 screws. Its HSS construction with three flutes delivers clean, accurate results in steel, cast iron, non-ferrous metals, and plastics.

Advantages

Ground from high-speed steel for durability and precision. The cylindrical shank ensures secure clamping in standard drill chucks. Bright finish reduces friction and improves chip evacuation.

Suitable for

• Steel
• Cast iron
• Non-ferrous metals
• Plastics

Key specifications

• Standard: DIN 373
• Screw size: M4
• Cutting diameter: 8.0 mm
• Clearance hole diameter: 4.5 mm
• Pilot hole diameter: 3.4 mm
• Overall length: 80 mm
• Shank diameter: 8 mm
• Number of flutes: 3
• Cutting direction: Right-hand
• Manufacturing process: Ground

Recommendations

Use with a suitable pilot drill and cutting fluid for optimal tool life and finish.