nVent Hoffman PRA1921THL1 Rack Angle The PROLINE G2 Rack Angles Plated and furnished in pairs mount using BV-M6 fasteners instead of the traditional cage nut and screw combination. The Rack Angle height and rack unit count are optimized for the PROLINE G2 frame heights. Rack Angles have two mounting surfaces that function in the attachment of rack-mount equipment and accessories. Can be mounted directly to the frame, or at variable depths using Adjustable Rack-Mounting Rails or Grid Straps; when mounted to the frame there is 44mm between the door opening and the Rack Angle mounting surface. Single-bay Frames: in a 600-mm wide frame, Rack Angles can be mounted in-line with the frame; in an 800-mm wide frame, Adjustable Rack-Mounting Rails or Frame Reducing Brackets are required (sold separately) to achieve the 19" rack spacing Double-Bay Frames: in a 1200-mm wide frame, Center Uprights must be used to create a mounting surface in the center of the enclosure for either bay; in a 1600-mm frame, Center Uprights are again required in addition to Frame Reducing Brackets or Adjustable Rack-Mounting Rails to achieve the 19" rack spacing Tapped-Hole Rack Angles are 12 gauge (2.5mm) steel and accommodate 10-32 screws for equipment mounting. Square-Hole Rack Angles are 14 gauge (1.75mm) steel and accept both metric and English cage nuts and screws: most commonly M5, M6, and 10-32 screws. Optional Shelves, Drawers, and Guides require two sets of Rack Angles to secure within the frame. All mounting hardware for Rack Angle installation into the frame is included; mounting hardware for securing rack-mount equipment/accessories to the Rack Angles is either supplied with the item or purchased separately.