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 5910-01-451-4292
NSN 6135-01-641-8640
NSN 5895-00-862-4238
NSN 6110-00-901-0861
NSN 6620-01-633-8443
NSN 6150-01-120-8487
NSN 6320-01-039-5891
NSN 5915-00-597-2369
NSN 5895-01-578-6090
NSN 6645-01-015-3684
NSN 5998-01-456-0858
NSN 2925-00-917-2842