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 5965-01-103-0398
NSN 5835-01-034-2040
NSN 6220-01-558-5039
NSN 5930-01-466-7222
NSN 6130-00-266-1051
NSN 6110-01-276-0745
NSN 6130-00-782-6983
NSN 6110-01-509-1263
NSN 5855-01-559-4901
NSN 5960-01-372-3290
NSN 5996-01-531-8564
NSN 5915-01-065-0413