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 6240-00-070-0866
NSN 5935-01-165-7065
NSN 5990-00-145-1187
NSN 6130-00-959-5800
NSN 5996-01-548-4952
NSN 5925-01-508-9339
NSN 5950-00-929-3167
NSN 2925-01-089-6269
NSN 4140-01-025-1555
NSN 2925-01-607-7754
NSN 4140-01-451-4657
NSN 6150-00-781-1663