The RGRB19CN Grounding Busbar provides the common grounding point within cabinets and is optimized for installation on 19” racks or cabinets that meet EIA-310-D. Engineered to comply with US and International grounding requirements and available pre-assembled with twenty mounting screws for quick and easy installation. Includes twenty #12-24 x 1/2" hex head screws installed; mounting hole sets have 5/8" (15.9mm) spacing; provided with two cage nut bonding studs and four #12-24 bonding nuts.