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 5930-00-153-0230
NSN 7035-00-553-6951
NSN 5855-01-264-8599
NSN 5855-01-631-8782
NSN 6130-00-424-7085
NSN 5975-01-649-6043
NSN 6320-00-908-6841
NSN 5996-01-387-4918
NSN 5985-00-280-8057
NSN 6240-01-563-1969
NSN 5960-01-084-7381
NSN 5855-01-424-7477