21,0x3,5 MM

Genuine Bosch 1610210096 — a sealing O‑ring specified at 21.0 x 3.5 mm, designed to restore the internal seal on Bosch rotary / Demolition hammers.

This original Bosch sealing ring is fitted in the tool’s speed‑governor/gearbox area to prevent dust and fluid ingress and help the mechanism run reliably; it’s a common spare among power tool parts for rotary hammers.

Example compatible models include GBH 5‑40 DCE, GBH 10 DC, GBH 11 DE and the GSH 11 series — check your tool’s10 digit version number to confirm fit.

Supplied as the original Bosch sealing ring, part 1610210096 is the metric replacement you want when repairing a worn or damaged seal; keep a couple of Bosch power tool parts on hand to speed repairs.

Browse our full range of Bosch hammer drill parts.