outside thread

outside thread

A thread on the external surface of a pipe or cylinder.
References in periodicals archive ?
Take the outside thread farthest to your right; pass it over and behind the thread next to it; push the end through the resulting hole; and pull tight to form a single knot.
Take the outside thread furthest to your right; pass it over and behind the thread next to it; push the end through the resulting hole; and pull tight to form a single knot.
A street elbow has inside thread on one end and outside thread on the other.
Anchor the weft by weaving across, then doubling around the outside thread and going back into the same shed.