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 5996-01-398-1632
NSN 5998-01-311-5302
NSN 5975-01-481-2470
NSN 5985-01-504-9572
NSN 6145-01-616-6190
NSN 5999-00-918-9582
NSN 5925-00-205-2767
NSN 7035-00-631-3782
NSN 6220-01-413-9373
NSN 5895-01-171-5149
NSN 6110-00-961-5204
NSN 5975-00-693-2531