Pilot for Counterbore- Various Sizes

Pilots for Counterbore

Used with counterbore for guiding counterbore whendrilling recessed holes into scales for Corby Bolts, Gulso Bolts, screws etc.

Pilot Head size should matchdiameter of hole drilled through tang(1/8″-1/4″). Shank size should match counterbore pilot hole size(i.e. 3/32″ or 5/32″)

Material- high speed steel

Counterbore must be purchased separately.

Selection Guide:

Corby bolts-

3/16″ uses Counterbore #CB1 with Pilot #PIL1

1/4″ uses Counterbore #CB2 with Pilot #PIL2

5/16″ uses Counterbore #CB3 with Pilot #PIL3

Gulso Bolts-

1/4″ uses Counterbore #CB2 with Pilot #PIL5

5/16″ uses Counterbore #CB3 withPilot #PIL2

3/8″ uses Counterbore #CB4 with Pilot #PIL4

Drill Bit Note

To drill holes in knife handles to use with piloted counterbores for fasteners, it is recommended to use the letter/number size slightly larger than the pilot size: with 1/8″ pilot use at #30 bit, for 5/32 pilot use #22, for 3/16″ use #11, for 1/4″ use F. This will ensure that the pilot does not bind up in the material and break off or pull out. We have these bits available in the Killer Force Drill Bit listing.