Aircraft Counterbores

434CO FOR COBALT 1/4“ DIAMETER SHANK 1-1/16 AND LARGER FURNISHED 1/2“ SHANK

USE SERIES 433 INTERCHANGEABLE PILOTS
Short set four flute aircraft counterbores are made from high speed tool steel properly heat treated. The outside diameter is precision ground with back taper to assure free cutting clearance and concentricity between hole and diameter. Corner radii ground to aircraft standards upon request.