Looking for a replacement for my broken brass external water bypass fitting for 303. This screws into the front timing cover. It looks like an elbow fitting with 3/8 NPT female to 1/4 NPT male. Tricky thing is it has a flare inside the 3/8 section to seal the water pipe. Here’s pictures:

 

That would appear to be an inverted flare female fitting, not a pipe thread.

 

Thank you! If I have to find one some other way, it will help to know exactly what I’m looking for. I’m hoping to find the original. I can’t seem to find anything that works at local hardware or plumbing supply companies. Even the internet is drawing a blank.

 

What size is the metal line that attaches to the female side? Thanks, Bob.

 

3/8”. I MAY have found a replacement. Made my Hillman. Part number 58343. I found one on Amazon. Not much info. Fingers crossed it’s what I need.

 

Looks very similar to a fitting Olds used on 65-66 a/c-equipped big car transmission cooler lines at radiator end. We had a hell of a time finding one for a 66 Starfire nearly 20 years ago.

 

Should be the same as a BBC fuel pump fitting
https://www.ebay.com/itm/Corvette-Fu...YAAOSwq4tfOBK-

 

Awesome! If the part I bought on Amazon doesn’t work I’ll grab one of those

 

Amazon came through! I can confirm a part made by Hillman, part number 58343 is a perfect replacement.

 

Great! Glad that you found what you needed.