Aircraft Counterbore, 13/16" Dia., 3/16" Pilot Hole, 2-3/4" Len. Made of High Speed Steel. Requires 1400P 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.

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

Hollow cutters are designed to cut away swagged or threaded collars from fasteners so that the fastener pin can be easily removed. Hollow cutters are ideal for removing Hi-Shear® rivets.

1/2" Dia, 1/4" Pilot Hole. Made of High Speed Steel. Requires AT404 series pilot.

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

1/4" Pilot Dia., 3/32" Shank. Fits 4000 series counterbores.

3/8" Dia, 5/32" Pilot Hole. Made of High Speed Steel. Requires AT404 series pilot.

3/8" Dia, 3/16" Pilot Hole. Made of High Speed Steel. Requires AT404 series pilot.

5/8" Dia, 5/16" Pilot Hole. Made of High Speed Steel. Requires AT404 series pilot.

Carbide tipped for durability making it great for composite work. 1/4” x 28 male thread. Requires 1500P pilot. There is a 3/32" pilot hole and 100 degrees.