G3/8 fitting

Greg_M

Well-known member
Dec 27, 2021
243
111
Vancouver Island
I need fittings to adapt the G3/8 female on a replacement radiator to the car's cooler lines. Does anyone have a source for these? or even the correct name of the adapter I need to make searching more efficient.
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Greg_M

Well-known member
Dec 27, 2021
243
111
Vancouver Island
I could get this done with G3/8 (British standard parallel thread (19tpi)) close nipples if someone knows where I can get them. Happy to pay for expedited shipping to get the car back on the road. Thanks,
 

eburrows

Well-known member
They both look like they're meant to hold an O-ring, so are probably straight threads. If you can get some calipers in there, you can measure the ID of the threads and OD of the hose nipple. With that, and the thread TPI you should be able to google your way to identify the threads. (A TPI gauge usually comes with a decent tap set, but you should be able to buy one on Amazon quickly.) With all that, you should be able to build an adapter with parts from mcmastercarr.com.
 

Greg_M

Well-known member
Dec 27, 2021
243
111
Vancouver Island
I think I paid more for shipping than the fittings.
Yes but it's my only vehicle right now and family health issues have me by the phone (with a serviceable vehicle ideally!) so I wasn't looking forward to time at the lathe in this case. You saved the day (and saved me a day at least). Thanks again. Your help was timely and invaluable. Appreciated to say the least!
Cheers
 
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