An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6105-01-537-7634
NSN 5965-00-678-8725
NSN 5925-01-642-5524
NSN 6145-00-134-0841
NSN 5950-01-135-8940
NSN 6135-00-299-6918
NSN 6610-00-504-2839
NSN 7035-00-753-0695
NSN 5999-01-457-3436
NSN 6645-01-332-8982
NSN 6645-00-255-1369
NSN 5915-01-005-3047