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 6220-00-466-2681
NSN 5905-01-145-1409
NSN 5935-01-156-4975
NSN 5990-01-463-2279
NSN 5965-00-079-7538
NSN 5930-01-345-8654
NSN 5985-01-544-5603
NSN 6620-01-621-0719
NSN 5985-01-187-8297
NSN 6645-01-186-9809
NSN 5920-00-584-4592
NSN 5835-00-177-2970