167788 - Miller 3/8-16 SEMS Nut with Cone Washer

Genuine Miller 167788 Replacement Nut

The Miller 167788 is a specialized hardware component designed to meet the rigorous specifications of Miller Electric welding equipment. This unit is a 3/8-16 thread hex nut manufactured from high-quality plated steel, ensuring durability and resistance to corrosion in industrial environments. The defining feature of this component is its SEMS construction, which integrates a free-spinning but captive conical washer directly onto the nut. This design simplifies assembly by reducing the number of loose parts handling and ensures that the correct washer is always used with the nut.

Technically, the nut features a 0.56-inch hex head, which corresponds to a standard 9/16-inch wrench or socket, making it compatible with standard tool sets found in most maintenance shops. The height of the nut is approximately 0.34 inches, providing sufficient thread engagement for secure fastening without excessive protrusion. The integrated cone washer has an outer diameter of 0.88 inches and is designed to act as a spring, maintaining tension on the assembly even under thermal cycling or mechanical vibration. This is critical for maintaining electrical continuity or structural integrity within the power source or wire feeder assembly.

When sourcing replacement parts for Miller equipment, using genuine OEM hardware like the 167788 nut is essential. Generic hardware may not match the specific plating thickness, steel grade, or washer tension characteristics required by the original engineering design. This part is supplied as a single unit and is ready for immediate installation. Whether you are repairing a chassis, securing a transformer, or replacing worn fasteners on a cart, this genuine Miller part ensures a factory-correct fit and function.