CHICAGO-LATROBE 1/2 in Body Dia Black Oxide High Speed Steel 3-Flute Countersink

The CHICAGO-LATROBE 56859 is a 90° three-flute countersink used for deburring and chamfering holes in metal, wood, and plastic. It creates a conical seat for flat-head screws and is common in automotive, aerospace, and general fabrication. The black oxide coating reduces friction and improves chip flow.

The CHICAGO-LATROBE 56859 is a general-purpose three-flute countersink with a 90° included angle, 1/2 in body diameter, and black oxide high-speed steel construction. It is designed for manual or machine use and produces clean, burr-free chamfers. The 3-flute design provides smooth cutting action.

3G Electric supplies CHICAGO-LATROBE countersinks worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on the 56859 or other CHICAGO-LATROBE tooling. We source and deliver to any country.

Select a CHICAGO-LATROBE countersink based on hole size and material. The 90° angle suits standard flat-head screws; use 82° for inch-series hardware. Match flute count to material: 3-flute for general use, single-flute for plastics. Ensure body diameter exceeds the chamfer diameter. Black oxide HSS works for most metals.