The 1.167.2500.50, also known as manufacturer part number NM-50-BE, is a metric locknut designed to secure threaded fittings while providing a reliable ground connection. It features a standard M50 x 1.5 thread for compatibility with corresponding connectors and has a thickness of 0.20 inches (5 mm). The locknut requires a wrench size of 2.01 inches (51 mm) across the flats for installation. Its design incorporates special cutting edges (BE) that bite into an enclosure's surface to ensure a secure, low-impedance ground path. This grounding feature is essential for applications requiring effective EMI/RFI shielding.