010667 - Miller .250-20 x 2.25 Socket Head Cap Screw Grade 8

High-Strength Grade 8 Socket Head Screw for Miller Equipment

The Miller 010667 is a specialized socket head cap screw utilized in various Miller welding power sources and wire feeders. This fastener is defined by its specific dimensions: a 1/4-20 UNC thread and a 2.25-inch length. It features a plain finish and is manufactured to Grade 8 standards, which is the highest standard grade for inch-series fasteners, indicating a tensile strength of approximately 150,000 psi.

In the context of welding machine repair, utilizing the correct grade of fastener is critical. Manufacturers like Miller Electric engineer their chassis and internal component mounts to withstand vibration, thermal expansion, and physical impact. A Grade 8 screw provides the necessary clamping force and fatigue resistance to keep heavy transformers, rectifiers, or fan assemblies securely in place. The socket head (hex/Allen) drive style is particularly useful in compact machine interiors where there may not be enough room to swing a standard external wrench.

This part is supplied as a single unit. Technicians should verify the specific location and quantity required for their machine model by consulting the parts breakdown manual. Replacing worn, stripped, or missing screws with the exact OEM specification prevents thread damage to the mating components and ensures the longevity of the repair.

Technical Specifications

• Thread: .250-20 (1/4" Coarse)
• Length: 2.25"
• Head Style: Socket Head (Cylindrical)
• Material: Alloy Steel, Grade 8