[AR] Re: BSPP vs NPT [male fittings for direct connection to a 3d printed aluminum part]

From: Michael Clive <zeinin@xxxxxxxxx>
To: arocket@xxxxxxxxxxxxx
Date: Tue, 4 Apr 2023 14:02:30 -0700

Industry standard is to use JIC/AN/MS boss port fittings. You can just put
a correctly sized hole, get the right reamer/contour tool from McMaster,
drop the hole, tap the threads and install a swage or an AN flare fitting.

On Tue, Apr 4, 2023 at 1:44 PM Terry Spath <dmarc-noreply@xxxxxxxxxxxxx>
wrote:

Checkout McMaster. I’m a UW grad Aero Astro

[image: image]

Sent from my iPhone

On Apr 4, 2023, at 2:37 PM, Hyunsoo Yoo <mind874@xxxxxxxxx> wrote:

BSPP vs NPT [male fittings for direct connection to a 3d printed aluminum
part]

Hello! My name is Hyunsoo Yoo, and I'm a Uni student in Seattle,
Washington.
I've been designing a liquid engine for a while now, and have decided to
3D print it out of aluminum.
I am currently in the process of deciding if I should tap 1/16 npt or 1/8
bspp directly onto the engine for thermal/pressure data collection.
The ideal connector would be a 1/16 bspp [iso parallel with gasket] to a
1/8 swagelok or compression fitting, but I have not been able to find it.
Npt sounds alright to me, but because I've heard many stories where the
threads got ripped off or leaked, I've been hesitant.

I'm wanting to keep the direct tap fittings on the engine as small as
possible.

Please let me know if you think there are better alternatives than 1/16
npt.

[image: image.png]
[image: image.png]
[image: image.png][image: image.png]

References:
- [AR] BSPP vs NPT [male fittings for direct connection to a 3d printed aluminum part]
  - From: Hyunsoo Yoo
- [AR] Re: BSPP vs NPT [male fittings for direct connection to a 3d printed aluminum part]
  - From: Terry Spath

[AR] Re: BSPP vs NPT [male fittings for direct connection to a 3d printed aluminum part]

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