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 6145-01-551-6263
NSN 7035-01-013-9889
NSN 5920-01-632-9049
NSN 5950-00-531-8609
NSN 6150-00-302-9074
NSN 5895-00-051-8347
NSN 5925-01-574-6134
NSN 5950-01-478-5869
NSN 5920-00-291-1379
NSN 6220-01-314-8409
NSN 6105-01-061-0124
NSN 6105-00-413-8097