The matching 1/8 NPT tee to the 601L elbow.
Tees machined from high quality SAE 660 bronze investment castings to use with 5/16” O.D. copper tubing. Larger through hole reduces restriction of original fittings made for obsolete 9/32” tubing. 1/8” tapered pipe thread connections only - no ¼”. Completely interchangeable with original nuts and fittings.