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 5998-01-152-1221
NSN 5835-00-185-4919
NSN 6685-01-478-5968
NSN 6220-00-403-0123
NSN 6610-01-505-6767
NSN 5945-00-096-7958
NSN 5935-00-222-9991
NSN 5915-00-969-9855
NSN 5990-00-905-6472
NSN 5975-01-253-3999
NSN 5945-01-401-5323
NSN 6105-01-335-4206