Usa 2-1/2" overseas metric 63.5mm
No other part numbers with same form, fit, and function found.
A fitting having three connections with the branch connection fixed at 90 degrees (1.5705 radians) to the run. The connections have standard pipe threads or 1s unthreaded and designed to accommodate a pipe. It may have side inlet(s). It is used as a junction at the intersection of pipe or pipe fittings.
NSN 6220-01-182-4322
NSN 5905-01-234-8290
NSN 6130-00-189-8000
NSN 5999-01-481-3133
NSN 6135-01-062-9356
NSN 5855-00-087-7833
NSN 5985-00-226-6230
NSN 6620-01-010-0038
NSN 6105-01-048-0701
NSN 6150-01-590-3682
NSN 6110-01-580-6415
NSN 6150-01-232-9347