A cylindrical cross section (joint) through which an axis passes. It's connected to a hinge-like item and allows movement.
NSN 5835-01-618-4906
NSN 6145-01-090-1086
NSN 5920-01-418-3450
NSN 5895-00-330-9655
NSN 5999-01-566-4002
NSN 6135-01-032-8887
NSN 5996-01-189-9480
NSN 5945-00-676-9406
NSN 5950-01-588-3406
NSN 6150-00-324-4409
NSN 6645-01-018-1799
NSN 6320-00-831-2227