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 5998-00-186-8583
NSN 5998-00-532-9471
NSN 6240-01-520-6925
NSN 7035-01-254-3044
NSN 6150-01-543-8574
NSN 5935-01-520-6396
NSN 6685-01-053-8297
NSN 6620-01-423-2612
NSN 6145-00-196-1394
NSN 6150-01-246-7621
NSN 5996-00-647-5160
NSN 6645-01-394-7544