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 6150-00-111-3194
NSN 5935-01-647-8378
NSN 6320-01-521-1764
NSN 5999-01-246-5677
NSN 5975-01-192-9895
NSN 5930-01-514-3197
NSN 5965-01-100-1195
NSN 5905-01-449-1291
NSN 6685-00-962-2724
NSN 5996-01-648-5964
NSN 6685-00-527-7952
NSN 6645-00-808-1407