Calbrite S64000LN00 Locknut is a 4-inch trade-size, 316 stainless steel locknut with a polished finish designed to join threaded RMC/IMC conduit to knockouts in metal enclosures. It threads onto the end of a conduit or connector inserted into a knockout, with serrated teeth that grip the knockout to resist vibration and prevent loosening in demanding installations. This UL514B-listed component (UL File #E308159) measures an inside diameter of 4.410 in and an overall length of 5.260 in, weighs 0.25 lb, and is intended for use with threaded metallic conduit (RMC/IMC).
