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 6685-01-082-2322
NSN 5835-01-126-9358
NSN 6610-01-207-0045
NSN 5998-00-840-5463
NSN 5930-01-430-8935
NSN 5996-01-074-2696
NSN 5930-01-444-3672
NSN 6610-01-216-9542
NSN 5965-01-381-4879
NSN 5835-01-332-2867
NSN 5895-00-707-6663
NSN 5930-00-903-8347