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 6645-01-614-4838
NSN 6685-00-879-9298
NSN 5999-00-126-8037
NSN 5975-01-123-4209
NSN 5905-01-268-3161
NSN 2925-01-629-9416
NSN 2925-01-251-5725
NSN 5996-01-188-2652
NSN 6320-01-567-9792
NSN 6645-01-091-9363
NSN 6135-01-438-9450
NSN 5930-00-176-3102