Pentair 9/16" Stainless Steel Washer

The Pentair 9/16" Stainless Steel Washer (Product #: 071011Z / 071011) is a factory-original OEM replacement hardware component engineered to distribute mechanical clamping force and reduce surface friction across high-capacity pool and spa equipment assemblies. Commonly utilized within the tensioning mechanisms, pump brackets, and heavy-duty filter body structural joints of various Pentair filtration systems, this premium washer sits beneath a mating nut or bolt head to provide a smooth, flat bearing surface. When a technician or homeowner torques down the equipment's primary fasteners, the washer prevents the rotating bolt head from scoring or cracking underlying polymer housings, while ensuring uniform load distribution to eliminate localized stress fractures. Forged from high-tensile 18-8 grade (Type 304) marine stainless steel, its rugged metallic matrix delivers outstanding resistance to continuous pump room humidity, severe seasonal thermal expansion, and direct exposure to aggressive pool chemistry like concentrated chlorine shock, muriatic acid, and advanced salt-chlorine generation. The physical dry weight of this single Pentair 9/16" Stainless Steel Washer is approximately 0.012 pounds (roughly 0.19 ounces, with a nominal packaged envelope shipping weight of 0.05 pounds), providing an essential, rustproof, and highly durable hardware standard to preserve structural integrity across pool pad installations.