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 6135-01-041-3829
NSN 6220-01-505-9880
NSN 5998-01-184-0264
NSN 6105-00-322-9430
NSN 5960-00-865-7550
NSN 5895-01-054-4104
NSN 5930-00-395-7053
NSN 5985-01-538-3719
NSN 5925-00-482-8704
NSN 5910-01-495-0271
NSN 5945-01-423-9086
NSN 6145-01-240-6339