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 7035-01-590-5610
NSN 6145-01-095-6556
NSN 5975-01-396-0488
NSN 5925-00-597-1558
NSN 5920-01-378-6528
NSN 6610-00-945-6782
NSN 5835-01-544-5183
NSN 6220-01-538-3186
NSN 4140-01-148-9046
NSN 5985-01-492-5943
NSN 5910-01-025-2115
NSN 6145-01-215-0178