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View Full Version : 1/8PT vs. 1/8NPT :Diff?


MrFairlady
05-11-2009, 12:17 PM
My sard FPR calls for a 1/8PT gauge port.
Went to get a gauge and its 1/8NPT.
Put Teflon Tape on it and went to thread it.It Threaded up Decent w/ 1 turn,...then got a tad harderafter that.after getting is as good as Tight as I could (know its a tapered Thread).Now when I even Prime the car *key turned* you can see it trying to leak.

whats the deal?
guy at the Shop said they are essentially the same PT v.s NPT
Wonder why its leaking.Too much Teflon tape?