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 5950-01-116-2142
NSN 5915-00-300-3853
NSN 5975-01-472-6450
NSN 5855-01-423-1497
NSN 5945-01-485-3959
NSN 4140-01-419-8592
NSN 5895-01-067-1098
NSN 6240-01-485-3116
NSN 5960-01-266-1011
NSN 5960-01-597-9591
NSN 5999-00-969-3856
NSN 6145-00-752-1675