Genuine Makita Driver Assembly (HY00000018) — direct replacement piston driver for Makita 18‑gauge brad nailers. This original Makita driver assembly includes the metal piston with driver (the seal/O‑ring is sold separately) and is designed to restore smooth firing and reliable nail seating in affected tools. Fits Makita AF505 and AF505N models. Ideal if your nailer’s driver is bent or worn — A genuine Makita part for a straight swap to get the tool back to original performance. Makita parts like this are built to the same specifications used in the original tool.
Jump straight to the Makita spare parts diagrams:
