Install Weight Horns Install bolts, washers, backing washers, and lock nuts securing weight horns to storage uprights using two 3/4" wrenches. Item Description Qty. 1 Weight Horn 8 2 Storage Upright 2 3 Bolt, HHB .5 x 4.5 16 4 Lock Washer, 1/2" 16 5 Backing Washer 16 6 Lock Nut, 1/2" 16 Tighten hardware to 20-25 ft-lb (27-34 Nm). Note: Weight horns can be installed in two configurations depending on the type of weight plates being used. Bumper Plate Configuration Standard Plate Configuration Parent topic: Assembly