Union Butterfield 47031.5/8 taper shank counterbore, 1-5/8 inch cutting diameter, 5 flutes. Part number 6210095. For enlarging and spotfacing holes to precise depths in machining applications.

Interchangeable pilot-counterbore body with 5-flutes, diameter 1.5/8" with an overall length of 8.1/8" and a flute length of 2.1/4" and MT 4 Morse-taper shank, according to ANSI standard to produce a flat bottom seat for socket-head cap screws with the aid of a pilot with a shank diameter of 7/16" and a maximum pilot guide diameter of 1.9/16", HSS with standard bright finish for machining free machining and plain carbon steel, wrought and copper or copper alloys.