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 5930-01-392-7277
NSN 6150-00-358-0646
NSN 5996-01-271-9927
NSN 5950-00-968-8665
NSN 6610-01-259-5296
NSN 5945-00-190-8006
NSN 5985-01-472-7540
NSN 6320-00-218-6105
NSN 6135-00-935-5241
NSN 6105-01-555-8757
NSN 5950-01-529-7914
NSN 6130-01-541-4634