A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5975-01-141-6531
NSN 5965-00-113-9748
NSN 4140-00-710-5660
NSN 5985-00-006-6889
NSN 6110-01-054-0299
NSN 2925-01-535-7235
NSN 5996-01-308-3739
NSN 6320-01-278-2359
NSN 7035-01-003-9142
NSN 6645-00-759-3962
NSN 4140-01-014-3454
NSN 5835-01-160-7282