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 6145-00-843-8744
NSN 6110-00-263-6664
NSN 5950-01-517-1025
NSN 5975-00-607-2403
NSN 6645-01-442-4032
NSN 6685-01-634-0611
NSN 5945-01-647-0960
NSN 5950-01-512-0544
NSN 6135-01-568-9107
NSN 5905-01-157-9685
NSN 6645-01-334-0782
NSN 4140-01-158-4139