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 5960-00-529-2704
NSN 6650-00-938-6785
NSN 6645-01-629-0847
NSN 6150-01-587-9409
NSN 5925-01-512-1651
NSN 5945-01-460-8440
NSN 6135-01-010-0891
NSN 5935-01-429-7691
NSN 5925-00-535-9640
NSN 5905-00-069-5725
NSN 6650-01-353-9299
NSN 5985-01-603-4604