The Ford Barn

Daisyarney · 07-01-2025, 09:00 PM

It’s most likely 1/2" NPT, since most carb-mounted fuel shut-off valves use tapered threads for sealing. However, to be sure, you could measure the thread diameter and pitch with a gauge or check the carb model’s spec sheet. Did you already check if it has a slight taper (NPT) or straight thread (UNF)?

redmodelt · 07-03-2025, 10:48 AM

Quote:

Originally Posted by Daisyarney

It’s most likely 1/2" NPT, since most carb-mounted fuel shut-off valves use tapered threads for sealing. However, to be sure, you could measure the thread diameter and pitch with a gauge or check the carb model’s spec sheet. Did you already check if it has a slight taper (NPT) or straight thread (UNF)?

No it is a straight thread and uses packing to seal or in some cases a brass ferrule. The other end that fits into the carb is pipe thread.

07-01-2025, 09:00 PM	#1
Daisyarney Junior Member Join Date: Jun 2025 Posts: 1	Re: Fuel Shut-off valve It’s most likely 1/2" NPT, since most carb-mounted fuel shut-off valves use tapered threads for sealing. However, to be sure, you could measure the thread diameter and pitch with a gauge or check the carb model’s spec sheet. Did you already check if it has a slight taper (NPT) or straight thread (UNF)? __________________ unblocked doodle jump Last edited by Daisyarney; 07-02-2025 at 09:14 PM.