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 6320-01-118-6662
NSN 5965-00-665-2156
NSN 6150-01-406-5296
NSN 5945-01-542-9117
NSN 6620-01-415-8550
NSN 6150-01-241-9352
NSN 5996-01-343-5529
NSN 5960-01-053-4358
NSN 5990-00-150-6979
NSN 5975-00-698-5791
NSN 6105-00-079-0044
NSN 5905-00-245-8752