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 6620-01-542-2689
NSN 7035-00-205-1932
NSN 5905-01-608-2878
NSN 5935-00-438-4356
NSN 6240-01-350-3533
NSN 5990-01-277-9753
NSN 5915-01-352-9830
NSN 5930-00-955-6714
NSN 5930-00-900-5758
NSN 6130-00-264-6195
NSN 6610-00-229-6742
NSN 6150-00-341-3860