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 6610-00-452-9126
NSN 6220-01-627-4889
NSN 6620-00-468-3665
NSN 5925-00-064-9726
NSN 5930-01-425-1352
NSN 5965-00-150-1144
NSN 5910-01-119-8025
NSN 6610-00-239-2397
NSN 5998-00-058-7059
NSN 5910-01-348-6156
NSN 5945-01-193-3270
NSN 5990-01-316-9477