National Hardware N174-284 Box Rail Hanger, 300 lb, Steel

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Designed for use with box rail on wood-frame, metal-clad door using a 2 x 4 in or 2 x 6 in frame. For use with #59, #5100, #5103, #5104, #5105, #5110, #5114 or #5116 box rail. Packed with four washers, four hex nuts and two end caps per pair. 1/2 in offset bolt adjusts both vertically and laterally from inside door. Connecting bolt threaded 7 in adjusts laterally 1 in by turning offset bolt for desired clearance. durable one-piece, precision-formed steel. Each hardened axle has 12 hardened and precision-ground alloy steel roller-bearings. Delrin seals keep out dirt while holding in L-life grease. Safe working load - 300 lb per hanger. 9 in bolt.