0.217 in OD tube
A measured tube group centered on 0.217-inch outside diameter. It is separated from nominal drill-size classes until a verified equivalence is recorded.
0.217 in OD
Observed outside diameters0.216" (5.5 mm)
Known kit lengths1
Linked kits / projects1
Replacement listings0
Match OD, wall thickness, and length.
The class name helps discovery; it does not override the kit maker's current tube specification. A close drill size does not prove that two brass tubes are interchangeable.