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 5915-00-518-0851
NSN 2925-00-592-2819
NSN 5985-00-271-9502
NSN 5895-01-381-7639
NSN 6135-00-593-6831
NSN 6130-00-949-9994
NSN 6130-01-168-8507
NSN 6685-01-333-2537
NSN 4140-00-223-8607
NSN 5835-01-578-3443
NSN 6110-01-261-3086
NSN 2925-00-753-8598