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 6110-01-423-3676
NSN 5990-01-463-0953
NSN 5990-01-147-8097
NSN 5990-00-242-3754
NSN 5965-00-617-5731
NSN 5920-01-590-3576
NSN 5999-00-470-0525
NSN 6150-01-317-6807
NSN 5950-00-617-6217
NSN 5965-01-137-3769
NSN 5965-01-139-2712
NSN 6650-00-067-3572