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 6650-01-162-2881
NSN 7035-01-388-6943
NSN 5975-01-527-2628
NSN 5910-01-580-1702
NSN 5855-01-418-6303
NSN 5960-01-391-8860
NSN 6320-01-094-2634
NSN 6145-01-026-9085
NSN 5855-01-287-1515
NSN 5835-01-386-4027
NSN 6650-01-156-4660
NSN 5985-00-974-5834