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 6650-01-501-5661
NSN 5925-00-806-7493
NSN 5835-00-550-7735
NSN 5950-00-529-0599
NSN 5960-01-044-9439
NSN 5910-00-457-7947
NSN 5950-01-603-6844
NSN 4140-01-059-6917
NSN 5855-01-201-4857
NSN 6105-00-655-9610
NSN 5965-01-523-8737
NSN 2925-00-964-7128