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 6645-01-302-9608
NSN 5905-01-023-6887
NSN 5895-01-106-4161
NSN 6150-01-250-8039
NSN 6320-01-246-4390
NSN 5985-01-003-8039
NSN 5985-01-518-4653
NSN 6110-01-340-4885
NSN 5930-01-492-1573
NSN 6130-01-547-2634
NSN 5950-01-366-9538
NSN 6240-01-536-7662