Pressure Gauge

If you don’t get an answer before too long, remove it and measure it. Got to evacuate the pressure to replace it anyway. 1/8” NPT would be obvious because it’s tapered. Whereas BSPP and metric are both parallel threads like a basic machine screw/bolt. No reason to think a Turkish manufacturer would adopt the British standard so it’s most likely either M8 or M10.
 
If it helps..

Go to Lowes or amazon or a good hardware store and get a thread guage . Metric/std. Or combined kit

The you pull your guage and easy see if straight or tapered as said above

The using the tool check the threads it has

(Example)


https://extrudesign.com/screw-pitch-gauge-thread-gauge-pitch-gauge/?expand_article=1

Then hunt a replacment with that knowledge

😉
 
Hoping someone here can tell me the size and threading for a Hatsan Flash pressure gauge. My gauge is no longer reading and Hatsan wants about $35 to ship a new gauge to me. Looking for something a bit less expensive that will work.
GO...with it !! What's your complaint ? Have you checked other brands prices...MORE ?
More than a fair price. Wika or other gauges will cost more !!

Mike