The AYD311NUR is a non-illuminated push-pull stop switch from the TWND Series featuring a 40mm mushroom head operator with 1NO-1NC (one normally open, one normally closed) contact configuration. This heavy-duty industrial switch is constructed with rugged components including a chrome-plated zinc locking ring, die-cast zinc mounting thread, and steel anti-rotation ring, designed for demanding industrial environments. The switch employs slow make, double break wiping contacts for reliable operation and is rated for UL Type 4X, 13 and IP65 watertight/oiltight panel mounting. Contact ratings vary by utilization category and operational voltage, with AC-12 control of resistive loads supporting up to 10A at 24V and 2A at 440V, while DC-12 control of resistive loads ranges from 10A at 24V to 1A at 440V. This switch is ideal for emergency stop applications, process control, and other industrial switching scenarios requiring robust, reliable performance in harsh environments.