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 6130-00-007-5992
NSN 5998-01-264-2797
NSN 6650-01-233-1484
NSN 5910-00-824-0188
NSN 5985-01-364-0040
NSN 6105-00-575-6485
NSN 6150-00-176-7442
NSN 5935-01-563-8885
NSN 5835-01-249-7393
NSN 6610-00-727-0882
NSN 6620-01-493-6072
NSN 5996-01-531-3583