Steve,
The block isn't English threads, it's Brittish Threads'
Read this:
Oil pressure 2-5/8"-connected directly to block /after using the correct
adapter./ The block is threaded for British Thread, (28 teeth per inch).
Most aftermarket gauges come with American Thread fittings (27 teeth per
inch) You can buy the correct adapter from
http://www.mcmaster.com/#4860K141 McMaster-Carr for around $5.00. When I
did mine I re-threaded the block for American standard threads. It is
probably better result using the adapter.
Eddie
steven boortz wrote:
> hi everyone
> thanks in advance for any help you might offer.
> i bought a new mechanical oil pressure guage (AutoMeter) because my original
>guage was giving some funny readings. i removed the original sender from the
>block, and attempted to insert the adapter (1/8 NPT female to 1/8 BPST male).
>i cannot thread the adapter into the block. at all. it won't even start.
>the 1/8 NPT compression fitting that would go into the adapter won't go into
>the block either. the original sender unit screws in by finger strength, no
>problem. i cannot tell by holding them together, whether the threads on the
>original sender are closer to the 1/8 NPT or 1/8 BPST, they are that close.
> any ideas?
> thanks again
> steve
> 675MIZU
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