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 5975-01-285-5772
NSN 5950-01-278-9057
NSN 5960-01-056-4982
NSN 5999-01-010-4695
NSN 5965-00-905-6895
NSN 5998-01-144-2602
NSN 6135-00-444-1402
NSN 5975-01-313-4321
NSN 5935-00-655-4427
NSN 5915-01-211-4934
NSN 5950-01-461-8783
NSN 5935-01-303-6742