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 5905-01-010-7550
NSN 5996-01-297-1564
NSN 5855-01-466-8027
NSN 6145-01-549-3370
NSN 5920-01-449-6048
NSN 5835-00-138-7807
NSN 6650-00-950-4107
NSN 6650-01-058-9008
NSN 6610-01-423-0250
NSN 6145-00-590-8642
NSN 5835-01-180-9441
NSN 6610-01-379-8524