What gauge nails does the P-C FN200 use? Support November 23, 2020 15:06 Updated Follow The FN200 uses 16 gauge nails. The length range from 3/4" to 2". Related articles What nails do I use with my DEWALT nailer? Can oil be added to the oil free nailers and will this harm the nailer in any way? What staples and brads fit the DEWALT DWHT75021 Stapler? Comments 0 comments Please sign in to leave a comment.