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 6220-01-438-2642
NSN 5950-00-548-9523
NSN 5895-01-386-5694
NSN 6110-01-048-7725
NSN 5945-01-611-0126
NSN 6685-00-840-5515
NSN 6130-01-502-8823
NSN 5895-01-233-4085
NSN 5910-00-033-7656
NSN 6220-01-437-0385
NSN 6645-00-372-2618
NSN 6650-01-582-2486