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 5996-01-268-8577
NSN 6240-00-197-6819
NSN 5930-01-435-4841
NSN 6620-00-115-9050
NSN 6240-01-443-6597
NSN 5910-00-221-8120
NSN 6135-01-231-4809
NSN 5945-00-376-4930
NSN 4140-00-751-1694
NSN 5915-01-615-3430
NSN 5895-00-467-5032
NSN 5975-01-238-6429