Used on door;nimitz class cvn. gasket retainer center to center screw holes along width 5/16 inch; center to center screw holes along length about 5"; 1/8 in heigth; 5/8 in width; length to suit
Used on F4. 0.620" center hole diameter back-up ring, rod type, non-radiused, sto, scarf angle item is made from nwr:wear resistant nylon, per gts-0020