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 6110-00-612-7146
NSN 5950-00-358-1140
NSN 5950-00-067-5689
NSN 5998-01-554-7029
NSN 5975-01-367-1458
NSN 6105-01-515-1231
NSN 7035-01-587-9360
NSN 4140-01-485-5351
NSN 6105-00-289-9993
NSN 5990-01-284-3187
NSN 5895-00-785-0500
NSN 5950-01-487-8657