Original Makita 213415-4 — a 28 mm O‑ring sealing gasket (black rubber) designed to restore reliable seals in affected housings and cylinders.
Precisely sized for a direct fit, it helps stop oil/air leaks and maintain compression where the original seal has worn or cracked.
Example fitment listed in Makita parts diagrams includes demolition hammers and several handheld models — for example HM1100C / HM1130 / HM1140C, HR3200C, HR3540C, and some belt sanders and circular saws such as 9403, 9921 and 5005BA. Check your tool’s parts breakdown for item 213415-4 to confirm fit.
Sold as an original Makita replacement seal, this O‑ring is an inexpensive, easy-to-install fix to return worn tools to proper operation without modifying components.
Note: the listing of compatible models above is representative; consult your tool’s illustrated parts list to verify that your model uses part number 213415-4 before ordering.
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