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 6105-01-493-2518
NSN 6220-00-844-3652
NSN 6145-00-866-5666
NSN 7035-01-338-5930
NSN 5950-01-268-1813
NSN 6610-00-471-9096
NSN 4140-01-481-4237
NSN 5835-00-198-4936
NSN 6610-01-428-3587
NSN 5990-01-485-0260
NSN 2925-01-495-9669
NSN 6620-01-478-9667