Original Makita 213609-1 — O‑Ring 50 . Precision-molded 50 mm sealing ring listed as part no. 213609‑1 (O RING 50) and shown in Makita parts breakdowns for their cordless brad nailers.
This is an original Makita spare parts item that replaces the worn seal in the nailer’s piston/cylinder area (positioned with the piston and cylinder end in the parts diagram), restoring the airtight seal that the drive mechanism needs to fire reliably.
Fits (examples): Makita DBN500 series (DBN500, DBN500ZJ, DBN500RTJ) and the XNB01 brad nailer line — the part is shown as O‑RING 50 in those model parts lists.
Simple to swap and sold as the single O‑ring listed in the diagram (quantity = 1), it’s a small, exact replacement among common power tool parts that will stop leaks and bring your nailer back to proper operation.
If you need the specific part reference when ordering or checking your tool’s diagram, use Makita part number 213609‑1 (O RING 50, XNB01).
Jump straight to the Makita spare parts diagrams:
