[Healeys] Oil pressure gage fitting

[Harold Manifold]

Hello,

I have a spare one of these adapters but it came off of a 3000 engine from
a MkI and it might be different from what was used on the 100.

Here are the specs. Small side that threads into the block is 1/8" BSPT -
tapered thread 28 TPI. The large side is 1/4 BSPP - parallel thread 19 TPI.
Note that NPT may be close in size but has a different thread form than
BSP. I made mistakes identifying fittings when I started restoring my car
and learned the hard way to measure twice. All of the pipe and tubing
fittings on my car were either BSPT or BSPP.

I hope this helps.... Harold

On Sat, Sep 2, 2023 at 1:58 AM Kees Oudesluijs via Healeys <
healeys at autox.team.net> wrote:

> AFAIAC these fittings are always BSP,  usually tapered male, parallel
> female threads. BSP fittings and adaptors are cheap and widely available in
> e.g. DIY shops or plumbers, at least in EU, but I also saw these in in US
> hardware shops.
> BSP (UK) threads are similar to NPT (USA) but the top angle of the thread
> profile is 55degrees for BSP and 60degrees for NPT. You usually can feel
> the difference as BSP has a rounded top while the NPT has a flatttened top
> that feels sharper.
>
>
> Op 1-9-2023 om 16:24 schreef warthodson--- via Healeys:
>
> Surely, someone has the specs on this adaptor?
> Gary Hodson
>
> On Wednesday, August 30, 2023 at 06:06:57 PM CDT, warthodson--- via
> Healeys <healeys at autox.team.net> <healeys at autox.team.net> wrote:
>
>
> What are the thread specifications for the adapter/fitting between the
> block & the oil press. gage flex line on a 100?
> I would like to know the TPI, thread form, and are the threads straight or
> tapered & anything else important that I forgot to ask about.
> Thanks,
> Gary Hodson
>
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