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 5920-00-150-1148
NSN 6685-01-006-1851
NSN 5855-01-156-0417
NSN 5895-00-406-7671
NSN 5935-01-199-6511
NSN 5925-01-079-8416
NSN 6240-00-557-3426
NSN 6220-01-136-7820
NSN 5895-01-499-9847
NSN 5965-00-653-4782
NSN 5945-00-023-9719
NSN 7035-01-144-6408