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A lock washer is a small but essential component in many heating systems, ensuring that fasteners remain secure under vibration and thermal expansion. In boiler and burner assemblies, this type of washer prevents nuts and bolts from loosening over time, which is critical for maintaining safe and efficient operation. Whether you are servicing a gas burner or performing routine boiler maintenance, having a reliable lock washer on hand can help avoid costly repairs caused by loose connections. This part is designed to fit standard fastener sizes commonly found in heating equipment, making it a practical addition to any technician's spare parts kit.