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 5960-01-599-9821
NSN 6150-01-605-7718
NSN 5985-01-317-6228
NSN 6110-01-117-0889
NSN 5915-01-026-7491
NSN 6105-01-226-5253
NSN 5996-01-084-2054
NSN 2925-01-155-2994
NSN 5910-01-571-8500
NSN 6220-01-479-6417
NSN 5998-01-122-2610
NSN 5930-01-655-5968