jegs sells a 1/8 bspt to 1/8 npt adapter.

 

I bought a couple of cheapo oil pressure gauges and they came with a bunch of brass adaptors including 1/8BSP to 1/8NPT. (The Miata oil pressure switch is 1/8BSP). Anybody close to you have a box of old fittings they didn't use when they put a gauge on their Honda?

 

I did exactly that on a Kia water neck, in order to plug some BPT holes with NPT plugs.

 

Sorry I don't have time to look but try to look here.

http://www.teejet.com/

If you can't figure it out call them and tell them what you are trying to do. They handle both NPT and BSPT items. Hope they can help you. If not they may know someone who can.

[EDIT: I looked at TeeJet and the closest I can find is a 1/4 hose barb nozzle adapter which requires two other parts to get everything you need, but the barb size is wrong. They do not have a 3/16 size that I see.]


Here is a 1/4 x 1/8 BSPT which you might be able to adapt your hose easier than finding the fitting.

Also I think Hagie sprayers are all BSPT, which makes them a PITA, but they also might be able to help you.

 

Think I'm going to get the 1/4" ones from the link above and hope for the best... Now can anyone find a 1/8" BSPT to AN-03 adaptor? Haha!

 

Actually if you get desperate this works. I have done it with Permatex gasket maker on water temperature sending unit fittings (1/8" NPT threaded into BSPT on the block) and it works fine. No leaks, long term.

For a boost solenoid I would not think twice about it since there are no fluids involved. Even if it leaks a tiny, minuscule amount (which it probably will not) it will not hurt anything.

Dumb question, but you do know that NPT (tapered) threads are SUPPOSED to do this, right? That is how they seal; there is an interference fit with the threads.

 

Honestly I would do the JB Weld method if I wasn't trying to turn around and sell the unit after it is repaired. I have one of the original fittings provided by APEXi and the taper on it is WAY more pronounced than the NPT fittings I purchased before knowing any better. I can get a full ~10 rotations by hand on the original fitting before needing a wrench to tighten it 2 more revolutions. Just trying to get the unit back to factory specs prior to selling it... Regardless of the effort I have to go through to do so. Thanks for all of the help guys, it is GREATLY appreciated.

 

Do you still have the old fitting? If so get a fitting with the size barb you need, cut the new barb off, and braze it to the old fitting. Much easier if you can braze/know someone who does.

 

I only have one of the old fittings, but I need two to complete the unit. Otherwise that would have been my plan... In my accident the hose barb portion got sheared off and only left only the threaded portion. Pic below...

 

If you can get the old fitting out, cut off a barb and braze it to the inside of that fitting maybe. Or cut off the very end of the threaded portion and braze it like Astro said. That or just a piece of tube that is slightly larger than the I.D. of the hose. It will seal well enough (for temporary use) with a bunch of zip ties.

Personally I would just order the right fitting from mcmaster or the like.

 

This is what I did earlier today. Ordered the one that was really close to what I'm looking for with the 1/4" hose ID barb. Should be okay in theory... I will update upon testing.

 

Found this place tonight....

http://www.coleparmer.com/catalog/pr...x.asp?cls=1473

Try this for BSPT to Flare. Not sure what the angle is for AN.

http://www.aeroquip.cc/aeroquiphydraulicadapters.aspx

 

Quick look, it's steel, but 1/8" bspt to AN-03 gay: http://www.pegasusautoracing.com/pro...p?Product=3230 .

Pegasus has lots of bspt stuff, just no barbs from the quick look I gave it.

 

Why dont you just tap it for 1/8 npt

 

^

Thanks for looking out for the AN-3 adapter for me guys. Steel or not, that one from Pegasus might be worth it. Now I just wonder if it is BSPT... Makes a difference as the BSP doesn't have a significant taper on it like the BSPT.

[EDIT]: Upon investigation of the Pegasus Racing offered fitting, it is the parrallel thread fitting and not the tapered like I need. FML.

rweatherford, thanks again man. I might just go up to AN-4 on the size. It will be used for my BOV and Wastegate fittings, so it should be more than enough overall air volume to make both function quite well. And the angle on AN is 37°.

 

Fittings arrived this morning via UPS from McMaster's ATL Warehouse... Test fitting is a go! The barb is just a LITTLE bit larger and longer, but should not be an issue for the buyer. Thanks again for all of the help guys!

And to answer someone else's question from earlier, in this case, yes, the Japanese DO use British Standard Pipe threads for their fittings (at least GReddy and APEXi do). O.o