CURTIS Valve CCA-2900, Fuel, Flush Mounted; 05-06490

Drilled for lock wire.

 

Thread	Locking	Flush Mounted	Open Action	Use Pin Type Cup	Material	Approval
1/2-20 UNF	No	Yes	Push	Yes	Brass, Unplated	FAA-TSO-C76

Thread: "UNF" (Fine thread) type are straight, non-sealing threads that rely on an o-ring to provide a seal. "NPT" (Pipe thread) type are tapered thread that seal as they are tightened.