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 7035-00-153-3826
NSN 5915-00-170-6775
NSN 4140-01-399-0330
NSN 5998-00-186-8583
NSN 5950-01-430-2203
NSN 6240-01-633-9357
NSN 5920-00-913-2897
NSN 5960-00-549-3760
NSN 5935-01-304-8442
NSN 2925-00-225-5386
NSN 5930-00-816-9780
NSN 5985-01-428-9394