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 5990-00-285-1948
NSN 5998-01-073-2454
NSN 7035-01-231-2450
NSN 6620-00-939-0462
NSN 5950-00-136-8421
NSN 5999-01-051-7540
NSN 5950-01-373-5036
NSN 5930-00-597-5064
NSN 5925-01-442-8589
NSN 7035-01-344-7836
NSN 6135-00-299-6918
NSN 6105-01-532-0395