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 6240-00-956-6424
NSN 6110-00-939-7065
NSN 5965-01-356-8360
NSN 5835-01-502-9228
NSN 6150-00-256-7957
NSN 6320-01-374-9924
NSN 5835-01-442-6482
NSN 5999-01-197-8688
NSN 6320-01-006-6138
NSN 6145-00-793-7816
NSN 6130-00-885-8929
NSN 5915-01-431-9754