Cage 62531 is the oem
A straight pipe fitting having a different size connection on each end. It is designed to join two pipes of different sizes or two pipe fittings of different sizes. Excludes bushing (as modified).
NSN 6130-00-900-8134
NSN 6145-01-017-5630
NSN 5965-00-503-2991
NSN 5990-01-206-7881
NSN 5925-01-593-8499
NSN 5915-01-161-1529
NSN 7035-01-123-8723
NSN 6145-00-681-1585
NSN 5975-01-411-6054
NSN 4140-00-660-8699
NSN 6320-01-491-0327
NSN 5965-01-591-0619