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 5999-01-656-4871
NSN 5998-01-647-0895
NSN 6610-01-520-5124
NSN 5835-01-238-3381
NSN 5925-01-126-4757
NSN 5930-01-398-0018
NSN 6645-01-371-0563
NSN 7035-00-252-7467
NSN 6150-01-568-2886
NSN 6610-01-138-1727
NSN 5855-00-973-5717
NSN 6650-00-195-7519