275463 - Miller Hex Washer Head Screw, 1/4-20 x 13.00 Inch, Grade 5 Plated

Genuine Miller Replacement Hardware

The Miller 275463 is a specialized Hex Washer Head Screw designed to meet the rigorous mechanical demands of industrial welding equipment. Engineered with a 1/4-20 UNC thread pitch and an exceptional length of 13.00 inches, this fastener is typically utilized in deep-assembly applications where standard off-the-shelf bolts fall short. Whether securing transformer laminations, fan assemblies, or structural chassis components, this screw ensures the structural integrity of your power source is maintained to factory specifications.

Grade 5 Steel Construction

Strength is paramount in industrial machinery. This screw is manufactured to Grade 5 (R5) specifications, indicated by the three radial lines on the head. Grade 5 fasteners are made from medium carbon steel that has been quenched and tempered, offering a proof load of 85,000 psi and a minimum tensile strength of 120,000 psi. This makes it significantly stronger than standard Grade 2 hardware, ensuring it can handle the vibration and thermal expansion cycles common in welding environments without yielding or failing.

Integrated Design Features

The fastener features a Hex Washer Head design. This integral washer base eliminates the need for a separate washer, simplifying installation and ensuring that the clamping force is evenly distributed over a larger surface area. This is particularly important when fastening against painted sheet metal or softer components, as it reduces the risk of crushing or marring the surface. The screw is also finished with a protective plating, likely zinc or similar, to resist oxidation and corrosion, ensuring the fastener remains removable for future service.

OEM Fit and Reliability

Using genuine Miller OEM parts like the 275463 screw guarantees compatibility. In complex assemblies, even a slight deviation in thread pitch, length, or material hardness can lead to assembly issues or premature failure. By choosing the manufacturer-specified part, maintenance professionals ensure that the equipment retains its original durability and safety ratings.