f391 Thread Size:1/4 - NPT Also makes the perfect cockpit

Also makes the perfect cockpit light in an emergency

These pipe thread sizes are the ones normally associated with the indicated tube sizes

Used to protect tubing

All Connections Quick-Disconnect

Isolated or grounded coils

f391 Thread Size:1/4 - NPT Also makes the perfect cockpitValve mounts in the sump, the same as original plug, with no projection. Cant be knocked off or opened by particles thrown from propellers. Opens only when operated with sampler cup, rod or wire. Clear cup permits inspection for water or contaminants. FAA approved. PN Manufacturing No. Application 05 01874 F 391 14 Aeronca, Beech AT 11, D 18S, Piper PA 11, 12,18, 20,22, Apache Champion, Howard 05 01875 F 391 18 Stinson, Waco VK, UPF, Seabee, Bellanca,