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 6620-01-645-4148
NSN 6650-00-264-0664
NSN 5935-01-463-5706
NSN 5910-01-062-0518
NSN 5996-00-081-2564
NSN 5925-01-350-4295
NSN 4140-01-349-1973
NSN 5996-00-342-9246
NSN 5950-01-579-9960
NSN 6610-00-716-5248
NSN 6105-01-091-5399
NSN 6610-00-509-0887