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 5855-00-999-6155
NSN 6220-01-411-6542
NSN 6685-01-657-4492
NSN 6105-01-512-1140
NSN 6620-01-161-8039
NSN 5998-01-294-7931
NSN 6130-01-043-9169
NSN 5920-00-366-0111
NSN 5920-01-426-8517
NSN 5996-01-567-9076
NSN 5960-00-269-4762
NSN 6320-01-521-1764