Bosch 1610210178 — original Bosch O‑ring seal designed for Bosch rotary hammers. This precision-molded elastomer sealing ring restores the internal seal in the hammer/gear assembly to Bosch tolerances and helps keep dust and lubrication where they belong. Fits a range of GBH rotary-hammer models (examples: GBH 2‑26 DRE / GBH 2‑26 E / GBH 2‑26 F and other GBH 2‑26 variants) and appears on official parts lists for those tools.

A compact, low-profile metric O‑ring made as an original Bosch replacement — an economical, exact-fit component when you’re repairing a Bosch rotary hammer and ordering individual power tool parts to return the unit to service.

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