266533 - Miller .500-13 Nylon Insert Flange Lock Nut

Genuine Miller Replacement Hardware

The Miller 266533 is a specialized fastening component designed to meet the rigorous demands of industrial welding environments. This hardware piece is a .500-13 (1/2-13) thread nut featuring a 0.75-inch hex drive and a height of 0.562 inches. It is engineered as a nylon insert flange nut, a design that offers superior holding power compared to standard nuts. When maintaining or repairing Miller welding power sources, wire feeders, or running gear, using the correct OEM specification hardware is critical for ensuring the longevity and safety of the equipment.

Integrated Flange Design

One of the key features of this nut is its integrated flange. The wide circular base acts as a built-in washer, distributing the clamping load over a larger surface area. This is particularly important when fastening against softer materials or oversized holes, as it reduces the risk of damage to the mating surface. By eliminating the need for a separate washer, the flange design simplifies assembly and reduces the number of loose parts required during maintenance procedures. This efficiency is valuable in busy repair shops where time and part count matter.

Vibration Resistance

Welding machines and industrial equipment are often subject to significant vibration during operation. Standard nuts can gradually loosen over time, leading to rattling components, poor electrical connections, or structural instability. The Miller 266533 utilizes a nylon insert at the top of the nut. As the bolt threads into the nylon, it creates friction and an interference fit that resists rotational forces caused by vibration. This self-locking mechanism ensures that the fastener stays secure even under the dynamic loads typical of heavy-duty welding operations.

OEM Quality and Fitment

Choosing genuine Miller parts guarantees that the hardware meets the specific material strength and dimensional tolerances required by the manufacturer. While generic hardware store fasteners may look similar, they often lack the specific grade or coating required for industrial applications. This nut is designed to fit perfectly with compatible Miller equipment, ensuring a hassle-free installation process. Whether you are replacing a lost fastener or performing a complete overhaul of a machine, the Miller 266533 provides the reliability expected from a top-tier welding brand.