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 5999-01-329-2199
NSN 5998-01-116-2639
NSN 5985-00-275-2830
NSN 5999-00-969-3856
NSN 5905-00-400-1637
NSN 4140-00-959-4255
NSN 6110-01-220-5888
NSN 5910-01-514-0041
NSN 5945-01-383-0625
NSN 6110-01-004-9870
NSN 5960-01-412-0619
NSN 5925-00-311-2341