Robert Charles Imperial 3 Flute Countersink 82° - 3/8 Head Diameter

The Robert Charles Imperial 3 Flute Countersink is a precision cutting tool designed for fast, accurate countersinking of imperial-sized holes. Featuring an 82° countersink angle and a 3/8 in head diameter, it is ideal for machinists, fabricators, and maintenance technicians who demand clean chamfers and reliable performance across steel, aluminium, and plastics.

Its 3-flute design delivers smooth cutting action, improved stability, and reduced chatter, helping you achieve consistent finishes with fewer passes in a wide range of materials and applications—from routine workshop tasks to production machining.

• Smooth 3‑Flute Cutting: The three-flute geometry provides stable, efficient cutting with less vibration, yielding clean, even chamfers and reducing tool wear across steel, aluminium, and plastics.
• 82° Imperial Countersink Profile: Precisely matched to imperial hole sizes to produce accurate chamfers that improve part fit and reduce post-processing time.
• Rugged, Reliable Build: Designed for daily workshop use and production environments, delivering consistent performance and long tool life you can depend on.

This countersink helps you complete countersinking tasks with confidence, speeding up workflows and delivering high‑quality finishes on every job—from maintenance repairs to production runs. Its durable, purpose‑built design supports repeatable results, so you can tackle challenging materials and tight tolerances with less rework and more reliable outcomes.