112480 - Miller 112480 Set Screw 1/4-28 x 0.375 Cup Point Socket Head

Technical Overview of the Miller 112480 Set Screw

The Miller 112480 is a precision-engineered socket set screw designed specifically for use within Miller welding power sources, wire feeders, and auxiliary industrial equipment. As a genuine OEM (Original Equipment Manufacturer) component, this fastener adheres strictly to the dimensional tolerances and material specifications required to maintain the mechanical integrity of Miller machinery. The screw features a 1/4-28 UNF (Unified National Fine) thread profile. The selection of a fine thread pitch over a coarse pitch (such as 1/4-20) is critical in this application; fine threads possess a larger minor diameter, providing greater tensile strength, and their lower helix angle offers superior resistance to loosening caused by the high-frequency vibrations common in welding environments.

The physical geometry of this fastener is defined by its 0.375-inch (3/8") overall length and its "Cup Point" tip. The cup point is the most common style of set screw point, characterized by a cup-shaped depression on the end. This design creates a thin, sharp circular edge that bites into the contact surface (typically a shaft or flat) when torque is applied. This "digging in" action provides exceptional holding power and resistance to axial movement or rotation of the secured part, such as a pulley, gear, or collar. The drive mechanism is a hexagonal socket, requiring a standard Allen wrench/hex key for installation, which allows for the application of significant torque without the risk of cam-out associated with slotted or Phillips drives.

Material composition is a high-grade steel with a plain finish. While plated fasteners offer corrosion resistance, plain steel is often preferred for internal machine components where tight tolerances are paramount, as plating build-up can alter thread dimensions. In MRO (Maintenance, Repair, and Operations) contexts, using the correct hardness and thread class is essential to prevent damage to the mating tapped holes in expensive casting or machined parts. Substituting this part with a generic hardware store fastener of unknown grade or incorrect thread pitch can lead to equipment failure or costly repairs.

Key Technical Specifications:

• SKU: 112480
• Thread Size: 1/4-28 UNF
• Length: 0.375 Inches
• Point Style: Cup Point
• Drive Style: Hex Socket
• Material: Steel (Plain Finish)