Makita 6401503002 Spare Part - *STOPPER RBC525/420E/525E

318732-8 supersedes older part numbers: 6401503002

Original Makita Stopper / Locking Ring — Part No. 318732-8. This small, original Makita retaining ring (listed as a stopper / "bague de verrouillage" in parts diagrams) secures the clutch/shaft/gear cover assembly on Makita petrol brushcutters, preventing the shaft or clutch from slipping out of position.

Fits: commonly listed for Makita RBC420, RBC420E, RBC525 and RBC525E in official parts breakdowns, so it’s the correct replacement to check for those models.

Details: sold individually; made to Makita’s original specification; installs into the assembly groove as a small lock/stop ring (remove/install with standard circlip/snap‑ring pliers). This is one of the inexpensive, frequently replaced power tool parts you’ll want on hand when repairing the clutch/shaft area.