A fitting with pipe threads having a female connection inside of a male connection, used in conjunction with another fitting, to connect in the same line, two pipes of different sizes.
NSN 6685-00-230-4267
NSN 5950-01-652-3667
NSN 6650-01-253-8062
NSN 6685-01-400-4192
NSN 5965-01-330-4042
NSN 6320-01-622-5493
NSN 5975-00-189-0857
NSN 5950-00-258-4445
NSN 5855-01-332-7594
NSN 5985-01-217-0585
NSN 6130-01-474-5190
NSN 6145-01-634-0388