Genuine Makita impact bolt (part no. 326469-3) — a hardened striker bolt used inside Makita breaker hammers to transmit piston energy cleanly and reliably, restoring full impact force and preventing further damage to the tool.
Fits Makita HM1812 and is listed in the HM1802 / HM1812 parts diagram as the impact bolt, so it’s the correct replacement when those breaker models show wear or chipping on the internal bolt.
Designed to interface with the HM18-series internal components (it mates with the 42 mm washer and the 47 mm rubber ring in the assembly), the replacement bolt restores correct spacing and sealing so the striker and piston operate as intended.
A straightforward drop-in replacement from Makita — stock part number 326469-3 — this genuine Makita item is commonly used among parts for power tools when servicing breaker hammers to get the tool back to spec.
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