First end is flat face-.688-16 ors male w/o-ring. Second end is 0.438-20 orb male
An adapter having a flange connection on one end designed to connect with another flange connection or a compression type mounting pad. The other end has standard pipe threads or is unthreaded and designed to accommodate a pipe. It is designed to join a flange or flange fitting to a pipe or pipe fitting in a straight line.
Classification: Flanges of iron or nonalloy steel
NSN 5985-01-345-2970
NSN 5965-01-164-7982
NSN 5895-01-180-9651
NSN 5835-01-431-6877
NSN 6610-00-709-1692
NSN 6685-01-132-4637
NSN 5930-01-023-6321
NSN 5925-01-166-7562
NSN 6135-00-422-3967
NSN 6150-01-207-9165
NSN 5895-01-357-6932
NSN 5965-01-196-1526