Makita 213499-2 — genuine Makita O‑Ring 31.5
A precision sealing O‑ring (marked 31.5) used in the piston/striker/cylinder area of Makita demolition hammers. It restores the cylinder seal that keeps impact performance and prevents air/fluid leakage, and is listed as a single replacement part in Makita’s parts breakdowns.
Example fitment (models where Makita lists 213499-2): HM1203C, HM1213C, HM1214C and GMH02 (GMH02PM / GMH02Z) — the part appears in the piston/cylinder/striker assembly in Makita parts diagrams for these models.
Notes for use: genuine Makita part 213499-2 is the specified 31.5 O‑ring used in the hammer assemblies (sold as a single item). Replace any damaged or flattened O‑ring and check mating surfaces for debris to ensure a proper seal.
(Part shown in Makita parts breakdowns as “O‑RING 31.5” — use this Makita part number when matching the replacement to your hammer.)
Jump straight to the Makita spare parts diagrams:
Browse our full range of Makita hammer drill parts.
