The M9145 is a gray nylon locknut designed to secure NPT threaded fittings. It features a 1-1/4 NPT thread size, a thickness of 0.281 inches (7.1 mm), and wrenching flats measuring 1.968 inches (50.0 mm). Constructed from Nylon 6/6, this locknut has a 94V-2 flammability rating and operates reliably within a temperature range of -30°C to 105°C. This component is ideal for providing a secure connection for liquid tight flexible conduits, tubing, and other fittings in various applications.