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 5895-01-283-8901
NSN 5920-01-584-6022
NSN 5920-00-665-3973
NSN 5996-00-862-3479
NSN 6135-01-201-5858
NSN 5960-00-728-3459
NSN 6110-01-438-2604
NSN 6650-01-302-7684
NSN 6620-01-352-5640
NSN 5985-01-348-8760
NSN 6105-00-171-6521
NSN 6220-01-487-3904