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 5998-00-925-2992
NSN 5945-01-525-8251
NSN 6685-01-142-1969
NSN 6645-01-011-6459
NSN 6220-01-630-4983
NSN 6220-01-497-1277
NSN 5855-01-429-8702
NSN 6650-00-242-7961
NSN 7035-01-344-8708
NSN 4140-01-305-6934
NSN 5945-01-025-9810
NSN 5975-00-727-6099