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 5905-00-900-0774
NSN 5965-01-381-4879
NSN 5920-00-285-2245
NSN 6110-01-603-7527
NSN 5910-01-268-4347
NSN 5935-00-652-7009
NSN 6135-01-338-2281
NSN 6220-00-389-6215
NSN 5920-00-012-2000
NSN 5950-01-434-1707
NSN 5975-00-379-2388
NSN 6685-01-605-3617