1/8 Npt fitting thread amount
#1
1/8 Npt fitting thread amount
So I'm doing a little project with meth injection and I'm wondering on a tapped 1/8 npt hole, how many threads should be contacting the fitting being screwed in? The hole is tapped in about 1/8 of material so it has about 4 threads after tapping. Fitting turns a few and gets right like it should. Is 4 threads enough u think or should I try to weld a bung on, this is cast aluminum so I don't know how well welding a bung will work
#9
4 threads should be fine. See this https://www.pegasusautoracing.com/do...ocID=TECH00097
That's what I wanted . Then I should be good. Good stuff. Thanks
#11
#15
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iTrader: (3)
The rule of thumb is 1/2 bolt diameter in thread engagement for maximum strength. The issue with NPT is it is an expanding thread and you have to be very careful threading it in too much. We made a meth fitting threaded into the runner in a stock LNF manifold for Cory ( R3volution) on here, I have some pictures someplace , it appears to be holding up but it is a fragile deal no doubt.
#16
The rule of thumb is 1/2 bolt diameter in thread engagement for maximum strength. The issue with NPT is it is an expanding thread and you have to be very careful threading it in too much. We made a meth fitting threaded into the runner in a stock LNF manifold for Cory ( R3volution) on here, I have some pictures someplace , it appears to be holding up but it is a fragile deal no doubt.
So that would be just the right amount on the intake
Without using a bung. If it ever pops out I'll just simply weld in some bungs. I doubt it will though, I know my charge pipe nozzle is screwed in about 3 or 4 threads and that's held for a good while. And that e6000 sealant is like glue. So Ill be good. Fun project
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