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Festool 27 mm (D27) tool port dust port size

The measured dimensions of the Festool 27 mm (D27) tool port and the hose sizes it mates with.

OD27 mm1-1/16 in, 27 mm

Rings drawn to scale from the measured diameters in the table below.

Measured port dimensions

Port typemale spigot (hose goes over it)
Outer diameter (OD)1-1/16 in, 27 mm
Manufacturer designation27 mm nominal, hose tip 23 mm ID / 35 mm OD

Shop notes

Found on: Festool sanders and compact tools that take the tapered D27 hose.

Festool calls it 27 mm, but the tapered D27 hose measures about 23 mm ID and 35 mm OD at the very tip. That 35 mm outer tip is why a D27 hose end also plugs into 35 mm EU ports, which is a real cross-brand shortcut.