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 5999-00-823-6151
NSN 6110-01-550-9762
NSN 5975-00-497-9968
NSN 6130-01-485-3575
NSN 6150-01-461-8706
NSN 5998-00-815-1896
NSN 5965-01-511-1997
NSN 6110-01-534-3881
NSN 6620-01-236-6290
NSN 7035-00-803-3056
NSN 6130-01-170-3577
NSN 6685-00-971-7406