Miller Potentiometer Mounting Nut with Neoprene Seal .375-32

Miller 266920 Potentiometer Nut with Seal

The Miller 266920 is a specialized mounting nut designed for securing potentiometers and rotary switches to the front panels of welding power sources. In the welding environment, equipment is constantly exposed to grinding dust, conductive metal fines, and varying levels of humidity. Standard nuts do not provide a seal, leaving the gap between the component shaft and the panel vulnerable to ingress.

This replacement nut features a bonded black neoprene seal (Pot Seal) on the underside. When tightened to the correct torque, the neoprene deforms slightly to fill the void between the nut and the faceplate, effectively sealing the mounting hole. This is critical for maintaining the IP rating of the machine and extending the lifespan of the potentiometer by preventing contaminants from entering the mechanism.

Technical Fitment: The nut utilizes a .375-32 (3/8-32) extra-fine thread, which is the industry standard for bushing-mount potentiometers. The outer drive is a .50 (1/2 inch) hex, allowing for easy installation with standard nut drivers or sockets. The total height is .36 inches, providing ample thread engagement without protruding excessively from the panel. Always verify your machine's parts manual to ensure this specific hardware is required for your serial number.

Key Features

• Sealing Capability: Prevents dust and moisture ingress around control shafts.
• OEM Quality: Manufactured to Miller's precise tolerances for a perfect fit.
• Material: Durable steel construction with corrosion-resistant finish and neoprene seal.