1/4" Dia, 3/32" Pilot Hole. Made of High Speed Steel. Requires AT404 series pilot.

A unique 6-fluted countersink designed to eliminate the chatter commonly encountered when using conventional countersinks.

A unique 6-fluted countersink designed to eliminate the chatter commonly encountered when using conventional countersinks.

Aircraft Counterbore, 27/32" Dia., 3/16" Pilot Hole, 2-3/4" Len. Made of High Speed Steel. Requires 1400P series pilot.

Aircraft Counterbore, 15/16" Dia., 3/16" Pilot Hole, 2-3/4" Len. Made of High Speed Steel. Requires 1400P series pilot.

#30 Pilot Dia., 1/8" Shank. Fits 4000 series counterbores.

19/32" Dia., Length 2-3/4", pilot 1/8". used with 1400P series pilots. 4 flute. Made of High Speed Steel. Requires 1400P series pilot.

3/4" Dia, 5/16" Pilot Hole. Made of High Speed Steel. Requires AT404 series pilot.

5/16" Dia., (For AT402 & AT403)

7/16" Dia, 5/32" Pilot Hole. Made of High Speed Steel. Requires AT404 series pilot.

1/4" Dia., Length 2-3/8", pilot 3/32". used with 1400P series pilots. 4 flute. Made of High Speed Steel. Requires 1400P series pilot.

5/8" Diameter. Overall length 1.19". Solid carbide tip for long life. 1/4X28 thread. Fits standard microstops