EPSU Auxiliary Contact Stud A18-9477

The EPSU Auxiliary Contact Stud A18-9477 is a specialized mechanical fastener designed for use in electrical switchgear and control systems, particularly in auxiliary contact assemblies for circuit breakers or relays. Manufactured by Eaton (associated with EPSU series, likely Eaton Power Systems Utility), this stud serves as a mounting or connection point for auxiliary contacts, ensuring secure electrical and mechanical integration in industrial power distribution equipment. Key features include threaded ends for easy installation, a stepped cylindrical design for precise fitting, and durable steel construction that resists corrosion and mechanical stress. Benefits include reliable performance in high-vibration environments, compatibility with Eaton's legacy switchgear like Westinghouse or Cutler-Hammer models, and ease of replacement during maintenance. Drawbacks may include limited availability due to it being a legacy part, potentially requiring cross-referencing for modern equivalents. Applications span industrial automation, power utilities, and manufacturing facilities where robust electrical connections are critical. Compared to generic studs, this model offers OEM-specific tolerances for better reliability and reduced downtime. Condition analysis from provided images indicates new or unused stock, stored in a plastic bag with minimal wear; no serial numbers visible, but handwriting confirms part A18-9477. Estimated market price range: $15-30 USD based on similar used/new listings on industrial surplus sites like eBay or Grainger; this is an estimate due to scarcity. Attached resources: Eaton Switchgear Parts Catalog (summary: includes part decoders and specs; link: https://www.eaton.com/content/dam/eaton/products/low-voltage-power-distribution-controls-systems/switchboards/legacy-parts-catalog.pdf); no exact datasheet found for A18-9477, suggest follow-up search for 'Eaton A18-9477 datasheet'.