Hertel 89330922 3/8x1/4x1-3/4 82° 4-Flute Chatterless HSS Countersink

This is a new Hertel 3/8 in x 1/4 in shank x 1-3/4 in OAL, 82-degree included angle, 4-flute chatterless countersink made from High Speed Steel (HSS) with a black oxide finish for corrosion resistance and reduced friction. The 4-flute chatterless design distributes cutting forces evenly to eliminate vibration and chatter, producing clean, smooth chamfers without tool marks — a critical advantage over single-flute designs in production environments. The 82-degree angle is the ANSI standard for flat-head machine screws (82° flat-head fasteners), making this the correct tool for countersinking #4 through #10 flathead screws in steel, aluminum, brass, and plastics. The 1/4 in straight shank is compatible with standard drill chucks and 1/4 in collet holders. Hertel, a production-grade tooling brand since 1947, manufactured this tool in China as marked on the body.

Product Specifications