The C&K Components 340102258BNMB is a female screwlock accessory designed for mounting D-Sub connectors to panels or backshells. Available in brass and stainless steel, these screwlocks offer varying levels of residual magnetism and torque specifications to suit different applications. Kits typically include a screwlock, washers, a lock washer, and a nut, providing a complete mounting solution. The screwlocks are compatible with ESA/ESCC quality levels and are available in various configurations for standard, saver, and feedthrough applications. They are commonly used in industrial automation, telecommunications, and data transmission equipment where secure and reliable connector mounting is essential.