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 6105-01-252-9548
NSN 7035-00-628-3471
NSN 7035-01-063-8753
NSN 5996-00-401-4904
NSN 5855-01-437-6161
NSN 6145-01-591-6095
NSN 5920-00-246-5992
NSN 5998-00-279-7268
NSN 6240-01-104-5693
NSN 5998-00-359-1354
NSN 2925-01-446-6523
NSN 6320-01-212-8749