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 6620-01-522-9125
NSN 5895-01-326-7757
NSN 5945-01-411-2822
NSN 5950-01-157-4637
NSN 5930-00-827-0907
NSN 6105-00-073-7692
NSN 6135-01-061-1862
NSN 5999-01-494-9227
NSN 6240-01-058-1392
NSN 5910-01-518-0040
NSN 2925-01-198-7528
NSN 5905-00-432-0579