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 5930-01-465-1056
NSN 6135-01-217-8810
NSN 7035-01-053-4769
NSN 5996-01-038-8474
NSN 6105-01-440-2653
NSN 5930-00-513-7940
NSN 5910-01-225-9916
NSN 4140-00-949-2438
NSN 6150-01-386-3071
NSN 5999-00-180-8712
NSN 5950-01-327-2696
NSN 4140-01-306-3663