217299 - Miller 217299 Screw, 1/4-20 x 0.87 Socket Head Grade 8

Genuine Miller 217299 Socket Head Cap Screw

The Miller 217299 is a high-specification replacement screw designed for use in Miller welding power sources and industrial equipment. As a genuine Original Equipment Manufacturer (OEM) component, this fastener is engineered to meet the precise tolerances and material standards required by Miller Electric. The screw features a 1/4-20 UNC thread pitch and a length of 0.87 inches (approximately 7/8 inch), making it a specific fit for designated assembly points within your machine's chassis or internal components.

One of the defining characteristics of this fastener is its Grade 8 rating. Grade 8 bolts and screws are manufactured from medium carbon alloy steel that has been quenched and tempered, offering a higher tensile strength compared to standard Grade 5 or Grade 2 hardware. This high strength is critical in industrial welding environments where equipment is subject to constant vibration, thermal expansion, and mechanical stress. Using a lower-grade substitute could lead to shear failure or loosening over time, potentially compromising the structural integrity or electrical grounding of the welding unit.

The head type is a Socket Head Cap, designed to be driven with a hex key (Allen wrench). This drive style allows for higher torque application compared to standard Phillips or slotted screws, ensuring a tight and secure fit. The cylindrical head profile is also ideal for applications where space is limited or where the screw head needs to be recessed (counterbored). The "Plain" finish indicates that this screw does not have a thick plating layer, ensuring that thread engagement is precise and not altered by coating thickness, which is often preferred for internal machine assembly where corrosion resistance is managed by the enclosure or other means.

When maintaining high-performance welding equipment, utilizing the correct hardware is just as important as replacing electronic components. The Miller 217299 ensures that your repair meets factory specifications, maintaining the safety and reliability of your investment. Whether you are performing routine maintenance or a critical repair, trust genuine Miller parts to keep your operations running smoothly.