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 5855-00-433-2377
NSN 5945-01-411-0942
NSN 5895-01-398-6493
NSN 5950-00-518-4645
NSN 5950-00-212-7827
NSN 6110-01-421-2714
NSN 6650-00-035-9297
NSN 5935-01-291-0816
NSN 5960-01-331-3817
NSN 6610-00-564-9360
NSN 6105-00-965-9796
NSN 5945-01-643-7026