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 5965-00-501-4867
NSN 6150-00-542-8668
NSN 5905-01-135-2851
NSN 6110-01-207-9172
NSN 5990-00-202-5127
NSN 5998-01-521-3782
NSN 5925-01-605-3888
NSN 6620-01-232-0680
NSN 5990-01-581-5103
NSN 6240-01-408-6394
NSN 6320-01-422-1212
NSN 5985-01-361-6709