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 6320-00-593-0379
NSN 5999-01-122-9192
NSN 5915-01-081-7102
NSN 6145-01-444-4509
NSN 5965-00-285-0745
NSN 2925-01-411-8002
NSN 7035-01-565-8702
NSN 6610-01-422-2376
NSN 6320-00-098-2858
NSN 5935-01-409-0868
NSN 5999-01-654-4946
NSN 6240-01-578-6227