CCB-33000 Curtis Superior Aircraft Oil Quick Drain Valve, 5/8-18 UNF | McFarlane Aviation CCB33000

Please confirm the CCB-33000 oil drain valve’s compatibility with your aircraft using this document:

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

Product Specifications:

• Thread: 5/8-18 UNF
• Locking: Yes
• Open Action: Push
• Material: Aluminum
• Hose Adapter Size: 3/8″
• Manufactured by Curtis Superior Valve Co., Inc.

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. Others are metric threads. Measure the O.D. of the thread on the valve you are replacing and compare to the thread specifications table to determine the correct thread size.
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 valves for ease of draining. The size indicated is the hose I.D.