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 6645-01-127-1793
NSN 5999-00-932-3690
NSN 5920-01-508-3614
NSN 5965-00-285-0745
NSN 6650-01-555-8819
NSN 5998-01-421-5679
NSN 5950-01-563-0494
NSN 2925-00-149-0760
NSN 6110-01-463-9010
NSN 6110-01-358-1478
NSN 4140-01-435-0874
NSN 7035-01-441-0942