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 6145-00-043-1257
NSN 5960-01-090-4205
NSN 5998-01-246-5252
NSN 5935-00-992-9590
NSN 6685-00-273-8733
NSN 5999-01-349-4143
NSN 5965-01-284-5076
NSN 5855-00-466-2309
NSN 6130-01-406-5353
NSN 5996-01-391-8050
NSN 5935-01-188-8545
NSN 5950-01-156-3719