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 6685-00-784-5690
NSN 5895-00-957-4532
NSN 6135-01-609-0843
NSN 5925-01-642-5204
NSN 4140-01-121-2182
NSN 6240-00-391-6402
NSN 6610-01-268-8456
NSN 5998-00-276-8599
NSN 2925-01-463-8856
NSN 5999-01-495-4817
NSN 6620-01-149-2842
NSN 6135-00-057-2005