1/2 hose nipple what is the thread size?
This chart amoung other things, gives you OUTside diameter of pipe which is kinda handy. 1/8" pipe EG is "about" 3/8 that is you can actually get 3/8 fuel hose on it hose barb style
Likewise, 3/8 pipe can be used example, to splice 5/8 heater hose.
ANSI B1.20.1 - NPT - American National Standard Taper Pipe Threads
This chart amoung other things, gives you OUTside diameter of pipe which is kinda handy. 1/8" pipe EG is "about" 3/8 that is you can actually get 3/8 fuel hose on it hose barb style
Likewise, 3/8 pipe can be used example, to splice 5/8 heater hose.
ANSI B1.20.1 - NPT - American National Standard Taper Pipe Threads