Fastener Guide

How to Drill a Pilot Hole

  1. Choose a drill bit slightly smaller than the screw root diameter — about 75% of shank diameter in softwood, 90% in hardwood.

    Save Step 1: Choose a drill bit slightly smaller than the screw root diameter — about 75% of shank diameter in softwood, 90% in hardwood.

  2. Mark the hole location with a punch to keep the bit from walking.

    Save Step 2: Mark the hole location with a punch to keep the bit from walking.

  3. Drill straight and to full depth, using a bit stop or tape flag for consistent depth.

    Save Step 3: Drill straight and to full depth, using a bit stop or tape flag for consistent depth.

  4. Clear the chips by pulling the bit back once or twice.

    Save Step 4: Clear the chips by pulling the bit back once or twice.

  5. Countersink if the screw head must sit flush.

    Save Step 5: Countersink if the screw head must sit flush.

  6. Drive the screw with steady pressure; stop before the head over-tightens.

    Save Step 6: Drive the screw with steady pressure; stop before the head over-tightens.

Related Fasteners