269004 - Miller 269004 Polyester Glass Laminate Insulating Washer

Genuine Miller 269004 Polyester Glass Laminate Washer

The Miller 269004 is a specialized flat washer designed for critical applications within Miller welding equipment. Unlike standard metal washers, this component is manufactured from Polyester Glass Laminate, a high-performance composite material known for its exceptional electrical insulating properties and mechanical strength. This washer is engineered to meet the rigorous demands of industrial environments, providing a reliable solution for spacing and isolation needs in power sources and wire feeders.

Material Composition and Benefits

Polyester Glass Laminate is a thermoset polyester resin reinforced with fiberglass. This composition offers several distinct advantages over traditional materials:

• Electrical Insulation: The primary function of this washer is often to electrically isolate components, preventing short circuits or unintended grounding within the machine's chassis.


• Thermal Stability: Welding machines generate significant heat. This laminate material maintains its structural integrity and insulating properties even at elevated temperatures.


• Mechanical Strength: It resists deformation under load, ensuring that bolted connections remain tight and secure over time.

Precise Dimensions for OEM Fitment

Using genuine OEM parts is crucial for maintaining the performance and safety of your welding equipment. The Miller 269004 features precise dimensions of 0.891 inches Inner Diameter (ID), 1.656 inches Outer Diameter (OD), and a thickness of 0.125 inches. These exact specifications ensure that the washer fits perfectly onto the intended shaft, bolt, or stud without modification. Incorrectly sized washers can lead to loose connections, vibration issues, or compromised insulation gaps.

Application and Maintenance

This washer is typically found in assemblies where electrical separation is required between conductive metal parts. When servicing your Miller welder, it is important to inspect all insulating components for signs of wear, cracking, or carbon tracking. If the 269004 washer shows any signs of damage, immediate replacement is recommended to prevent equipment failure or safety hazards. Trust in genuine Miller parts to keep your equipment running at peak efficiency.