602159 - Miller 602159 Screw, 5/16-18 x 0.75 Hex Washer Head Self-Forming

Genuine Miller 602159 Replacement Hardware

The Miller 602159 is a specialized hex washer head screw designed to meet the rigorous standards of Miller Electric welding equipment. As a genuine OEM component, this fastener is engineered to the exact specifications required for maintaining the structural integrity and performance of your welding machine. The screw features a 5/16-18 thread pitch and a length of 0.75 inches, making it a common fastener size used throughout various Miller power sources and wire feeders.

Constructed from high-quality plated steel, this screw offers essential corrosion resistance, ensuring longevity even in harsh industrial shop environments. The "SLFFMG" designation indicates that this is a self-forming or thread-rolling screw (often referred to as Taptite). Unlike standard machine screws that require pre-tapped holes, this fastener is designed to roll its own mating threads into a pilot hole or nut member. This process work-hardens the nut material and creates a zero-clearance fit, providing exceptional resistance to vibrational loosening—a critical feature for heavy-duty welding machinery that generates significant vibration during operation.

The Hex Washer Head (HexWHD) design incorporates a washer face directly into the head of the screw. This provides a larger bearing surface area to distribute clamping load, preventing damage to the mating surface and eliminating the need for a separate washer. Whether you are performing routine maintenance, replacing a damaged chassis component, or reassembling a machine after repair, using genuine Miller hardware like the 602159 ensures that your equipment remains safe, reliable, and within factory specifications.