Pentair 5/16" x 1" x 1/8" Stainless Steel Small Diameter Washer

The Pentair 5/16" x 1" x 1/8" Stainless Steel Small Diameter Washer (Part #191060) is a specialized, corrosion-resistant hardware fastner used primarily within the mechanical tensioning assemblies of Pentair pool and spa filtration systems, most notably on the heavy-duty tank clamp bands of FNS Plus D.E. filters and Clean & Clear Plus cartridge filters. Formed from high-grade 18-8 marine stainless steel, this dense spacer washer is engineered to endure harsh chemical environments, constant moisture, and immense tension loads without oxidizing, flattening, or deforming over time. Positioned directly between the tensioning spring coil and the tightening nut on the filter's main structural clamp bolt, it provides a slick, flat surface area that evenly distributes mechanical compression, enabling pool technicians to safely torch down the locking hardware to its correct torque specification without damaging adjacent components.

As an individual piece of commercial-grade hardware, its weight is minimal but dense:

• Actual Product Weight: Approximately 0.02 pounds (roughly 0.32 ounces).

• Packaged Shipping Weight: Typically listed at 0.05 pounds (under 1 ounce) when shipped in a standard protective parts baggie.