The Miller 257864 is a specialized T-style knob designed as a direct OEM replacement for compatible Miller welding equipment. Precision-engineered to meet the exact specifications of the original manufacturer, this component ensures seamless integration with your existing machinery. The knob features a T-bar configuration with a width of 1.265 inches, providing a compact yet functional grip surface suitable for various adjustment points on industrial equipment. The integrated stud utilizes a standard .250-20 (1/4-20) thread pitch, a common fastening standard in mechanical assemblies, ensuring broad compatibility where this specific part number is called for.
Constructed from high-quality industrial plastic, the head of the knob is designed to withstand the rigors of daily shop use while remaining lightweight. The threaded stud extends 0.625 inches (5/8 inch) from the base of the handle, providing ample length for secure engagement with internal threads or nuts without bottoming out prematurely. Using genuine Miller parts like the 257864 is critical for maintaining the integrity of your welding power source or wire feeder, as aftermarket alternatives may not adhere to the strict dimensional tolerances required for proper vibration resistance and fitment.
This component is often utilized in applications requiring frequent manual adjustments or the securing of access panels where tool-free operation is preferred. The plastic composition offers electrical insulation properties inherent to the material, which can be a safety factor depending on the specific installation location on the machine. When sourcing replacement parts for mission-critical welding operations, relying on the specific internal SKU MIL257864 guarantees that you are receiving the authentic component intended by Miller Electric engineers for your specific model series.
Whether you are performing routine maintenance or repairing a damaged unit, this T-knob represents the standard for quality and fitment. Please verify your machine's parts manual or serial number to confirm that part number 257864 is the correct replacement for your specific unit before purchasing.
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