Genuine DeWalt replacement O‑ring, part number 2041108-06131 — a small sealing ring used to restore airtight seals and reliable firing in compatible cordless nailers. It’s the original DeWalt O‑ring listed for the DGN9033 (Type Rev A) nailer and is also shown as compatible with the Bostitch GF9033‑E (Type Rev‑A).

This item is supplied individually and installs in the tool’s valve/piston seal area to stop leaks, cut air loss and bring back consistent drive power — a quick, straightforward repair when the sealing lip has worn or torn.