Description Product Reviews Chatsworth 12121-712 6″ Channel Rack to Runway Mounting Plate Secures Cable Runway to the top of 6D (150 mm) Standard Rack. Mounts Works with Ladder Rack Runway from 9-12 inches. 12121-712 consists of: (1) mounting plate (4) 5/16-18 x 2 1/4 J-bolts (4) 5/16-18 hex nuts (4) 5/16 split lock washers 0 Reviews Hide Reviews Product Reviews