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 5960-01-632-6576
NSN 5990-01-591-8797
NSN 6220-01-025-1373
NSN 6620-01-471-8128
NSN 5960-01-061-6216
NSN 6685-01-601-6063
NSN 5915-01-597-9432
NSN 5925-01-281-8076
NSN 5998-00-884-6254
NSN 5910-01-218-5987
NSN 5835-01-046-9615
NSN 6610-00-626-4086