Does the Bostitch 23 gauge headless pin tacker countersink the pins deep enough to fill the holes with putty? Wilson October 03, 2020 18:19 No. The pins are driven just slightly below the work surface. This tool is designed to drive pins into very thin materials without splitting. Excessive countersinking in this material will cause splitting. Related articles Common O ring kits and trigger valve kits for Bostitch tools Comments 0 comments Please sign in to leave a comment.