SKU: PTR05-0730
MPN: 05-0730
The Peterson Fluid Mandrel Step Washer 7/16in ID (part number 05-0730) is a precision aluminum component designed for engine cooling system assembly and maintenance. This step washer features a 7/16-inch inner diameter and is engineered to provide a stable seating surface for hose connections, water pump applications, and thermostat housing installations where controlled radial support is critical.
Manufactured from natural aluminum, the mandrel step washer offers excellent corrosion resistance in typical automotive and marine cooling environments while maintaining a lightweight profile essential for engine bay assembly. The stepped design allows for precision fitting in confined spaces where standard flat washers would not function effectively, ensuring proper load distribution across dual-diameter hose interfaces.
Engine builders, restoration specialists, and cooling system technicians benefit from this mandrel step washer for applications requiring precise hose securement and component alignment. It serves as a critical interface component in custom engine builds, vintage vehicle restoration, and performance cooling upgrades where OEM specifications demand accurate step geometry.
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