The 250-8501-010 is an extended jackscrew assembly designed for D-subminiature connector locking applications. It features #4-40 UNC-2A threads and is constructed from brass with a nickel finish, providing corrosion resistance and durability. The assembly measures 50.00 mm (1.969 inches) in length with a 4.30 mm (0.169 inch) diameter and 9.00 mm (0.354 inch) width, and requires a quantity of 2 per connector. This component is RoHS compliant and is commonly used in D-subminiature connector backshell assemblies to provide positive mating and secure locking for high-vibration applications and Ethernet connections.