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 5975-00-391-6357
NSN 5905-00-588-6614
NSN 6135-01-365-2707
NSN 5950-00-924-7252
NSN 5835-01-529-3050
NSN 6145-01-495-3382
NSN 6240-00-892-6175
NSN 6620-01-039-5468
NSN 5915-01-441-2982
NSN 6645-00-805-0066
NSN 5975-01-502-1908
NSN 6105-01-500-8265