10,5x2,7 MM

Original Bosch O‑ring — part number 1610210046. This is a genuine Bosch rubber sealing ring specified at 10.5 × 2.7 mm (diameter × cross‑section), made to seal rotating and hydraulic/gear interfaces inside rotary-hammer assemblies.

Fitment: appears on Bosch rotary-hammer and demolition-hammer parts lists — for example, Bosch 11255VSR (3611B76010), 11536VSR (3611J00R10) and GBH18V‑26D (3611J16011) are shown using this O‑ring in their internal parts breakdowns.

Why this part matters: replace a worn or flattened O‑ring with this original Bosch seal to restore proper oil/air sealing and maintain correct bit/drive operation; small, low-cost, and easy to install during a routine service. This item is listed among other Bosch power tool parts used in service and repair diagrams for rotary hammers.

If you need a simple replacement sealing ring for your hammer, this original Bosch 1610210046 is the exact match shown in the factory parts breakdowns for the models above. It’s a common spare when ordering parts for power tools.

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