CCB-4320 Curtis Superior Fuel Drain Valve 7/16-20 UNF

Please confirm the CCB-4320 fuel drain valve’s compatibility with your aircraft using this document:

• Fuel system parts section of McFarlane Aviation catalog (PDF)

Curtis Superior Valve Co. Inc. has produced, engineered, manufactured, and tested aircraft valves to exacting standards since 1944. They have many standard valves to solve a wide range of problems. Drilled for lock wire.

• Manufactured by Curtis Superior Valve Co., Inc.
• FAA-TSO-C76* Approved
• Supersedes: 1100B52Z-G, 71D-4, BJ1000AS1M
• Thread: 7/16-20 UNF
• Locking: No
• Flush Mounted: No
• Open Action: Push, Button Style
• Use Pin Type Cup: No
• Material: Brass, Cad Plated
• National Stock Number (NSN): 2915-00-532-7404
• Corrosion resistant, stainless steel spring
• Specially compounded “cure dated” synthetic rubber seals to withstand a wide variety of liquids over a broad temperature range
• Unique wedge seal design prevents leakage

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.
Locking: Valve locks in the open position for easy draining.
Flush mounted: Valve is designed to mount flush with aircraft skin.
Use Pin Type Cup: Pin type cups similar to MCCCA-39680 may be used with indicated valves for sampling fuel.
Open Action: “Spiral” valves require a push and turn action to open. “Push” valves require a push action to open.
Hose Adapter Size: A hose may be attached to the valve for ease of draining fuel. The size is the hose I.D.