Repair NPT Male Thread With Repairing Die

[65CCJ]

I have a 1/2 NPT Male Brass fitting with NPT thread cut with wrong taper (2.2 instead of 1.788 degrees). Looks like it was single pointed and they attempted to fix them with a die but that's just a guess. It gages within +/- turn to face of thread but worries the incorrect taper will allow it to leak.

1. Is this incorrect taper reason alone to scrap? Even though it gages, I don't think it will make-up wrench tight properly and will leak.
2. Because the taper is too steep, could this be corrected with a Repairing Die?
3. Could the face be pushed back 1/8" and use a Die to "chase" the existing threads deeper and correct the taper issue? Or with single point on lathe?

There is only 1/8" of length left to work with to try and correct the problem or I'll have to scrap the part. Material is 360 Brass

 

[3DDave]

I would be more concerned that the too-steep taper means that the length of engagement for full threads is compromised. I expect that enough sealant can prevent leaks, but it cannot offer stability against external loads or providing enough tensile strength.

I doubt that 1/8" is enough.

A "repairing die" is typically used when the crests of a correctly made thread are damaged, like using a pipe wrench to remove a stubborn stud or pipe stub. It makes a minimal removal of displaced material while leaving the majority of the existing thread in place. I suppose there are also thread-rolling tools that will push material instead of cutting it, but neither can restore what wasn't in place to begin with.

 

[mfgenggear]

yes scrap it, start over

 

[BiPolarMoment]

First you get parts with no taper and now parts with too much taper? Is this the same supplier?