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 5935-01-029-3086
NSN 5895-00-911-2273
NSN 6220-01-601-3429
NSN 5998-01-197-7915
NSN 5998-01-311-2468
NSN 6220-01-608-2404
NSN 5990-00-765-1264
NSN 5999-01-147-5654
NSN 5996-01-546-9692
NSN 6130-01-651-0957
NSN 6220-01-353-3200
NSN 5950-00-932-3232