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 6320-00-977-3930
NSN 5910-01-226-2891
NSN 5985-01-163-6679
NSN 5998-01-519-9273
NSN 5945-00-760-3417
NSN 5999-00-217-1870
NSN 5950-01-489-5635
NSN 4140-00-433-9571
NSN 5975-01-538-8261
NSN 5835-00-366-0240
NSN 6145-01-257-7589
NSN 5960-00-215-5884