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 6110-01-633-9660
NSN 6320-00-422-9006
NSN 2925-01-633-4048
NSN 5960-00-790-0509
NSN 7035-01-145-5059
NSN 5999-00-993-5448
NSN 4140-01-022-8613
NSN 6105-01-504-3250
NSN 5965-01-223-9218
NSN 5895-00-877-4875
NSN 5915-01-656-5236
NSN 6145-01-642-2744