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 5915-01-280-9192
NSN 5965-00-243-0207
NSN 5835-01-432-1277
NSN 5950-00-879-3214
NSN 4140-01-438-3854
NSN 6685-01-071-0211
NSN 5925-00-706-9975
NSN 5920-01-010-7101
NSN 5999-01-013-9236
NSN 6320-01-157-9076
NSN 6110-00-567-0611
NSN 6105-01-295-5307