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 5930-00-730-0510
NSN 5855-01-543-3338
NSN 5945-01-437-5593
NSN 5895-01-096-0257
NSN 5835-00-422-1441
NSN 5915-01-409-1010
NSN 5960-01-399-4327
NSN 6320-00-593-0379
NSN 6240-00-495-6763
NSN 6110-00-827-3026
NSN 5950-01-608-8441
NSN 6135-00-194-9354