A standoff, internally and/or externally, threaded on both ends with a hinge or pivot point to allow for independent movement of the ends.
NSN 5985-01-509-2124
NSN 5910-00-281-2449
NSN 2925-01-182-9924
NSN 6685-00-221-5750
NSN 5935-00-156-6834
NSN 6645-01-461-1147
NSN 6105-00-279-3044
NSN 5945-01-332-4585
NSN 5915-01-181-1150
NSN 5950-01-306-5209
NSN 5996-01-042-6493
NSN 6130-00-270-1024