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 5999-00-515-7354
NSN 6220-01-205-5167
NSN 5990-01-573-1634
NSN 5835-01-058-9960
NSN 6135-01-286-9563
NSN 6110-01-313-7147
NSN 5996-00-337-5158
NSN 5925-01-428-9978
NSN 5998-01-413-2815
NSN 5895-00-209-5456
NSN 5905-01-317-0657
NSN 6130-01-211-0224