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 6240-01-393-5095
NSN 5990-00-424-1598
NSN 6610-00-516-4228
NSN 5945-01-262-8695
NSN 6130-01-090-0248
NSN 5996-00-892-7828
NSN 6320-01-291-4870
NSN 5915-01-601-0047
NSN 6620-00-824-4609
NSN 5996-00-466-9781
NSN 5965-00-478-3442
NSN 5960-01-485-2467