"Screw and Nut Set, available in either black or silver finish. 6 each threaded screws (posts) w/ nuts for attaching EEK-4 visor assembly on HGU-33 or HGU-55 series helmet, or for single visor housing on HGU-2A/P, AFH-1, and most other single visor helmets. Will work on either Medium, Large or Extra Large helmets."