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 6105-01-561-5923
NSN 5945-01-012-3228
NSN 6320-01-425-1417
NSN 5915-00-177-7125
NSN 6620-01-392-7191
NSN 6610-00-419-0315
NSN 5920-00-524-2291
NSN 5950-01-275-0863
NSN 5950-01-445-6004
NSN 6130-01-209-3236
NSN 5999-00-948-9249
NSN 6220-00-310-3935