Makita 422215-3 — Rubber Ring (XNB02). This original Makita rubber seal is the small, precision-molded ring used in the XNB02 driver/piston assembly to maintain the air seal that controls nail firing.
It’s a single rubber O‑style ring sold individually for straightforward replacement when the piston seal is worn, torn or hardened and causing misfires or loss of drive pressure.
Compatible with the Makita XNB02 series (including XNB02Z and XNB02RJ) according to parts breakdowns; some parts lists also reference the same ring on certain DBN600 finish‑nailer spare lists.
Order the part by number (422215-3) to ensure a correct fit — buying genuine Makita parts like this one keeps tolerances correct in the driver assembly and avoids fitment issues.
A small, low‑cost replacement in the world of power tool parts, this rubber ring is exactly the item to swap in when piston sealing is the likely cause of inconsistent nailing.
Jump straight to the Makita spare parts diagrams:
