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 5998-01-468-0696
NSN 6620-00-004-5466
NSN 6105-01-193-6575
NSN 5985-00-666-2987
NSN 5996-01-564-6864
NSN 5915-00-107-2576
NSN 5998-01-322-7979
NSN 5935-01-544-4655
NSN 5999-01-523-1386
NSN 6135-01-066-6904
NSN 5960-01-467-0961
NSN 5990-00-752-2126