"TEE, REFERENCE NUMBER 30780/6-JW-SS, MODIFIED TO ADD 1/4 INCH INTERNAL NPT THREADS TO BRANCH CONNECTION AND ONE END CONNECTION; NEXT ASSEMBLY 4667020 AIR CLUTCH ASD USED ON ITEMS 4684657 AND 4648129; ALTERNATE TO NSN 4730-01-465-3139 WHICH HAS ONE THREADED END"