Pentair Spring Barrel Nut Assembly

The Pentair Spring Barrel Nut Assembly (part number 192320 or 192320Z) is a critical mechanical safety and fastening package engineered exclusively for the heavy-duty stainless steel clamp band assemblies found on Pentair Clean & Clear Plus cartridge filters, as well as FNS Plus and Quad D.E. filtration systems. This essential heavy-duty hardware kit features a robust compression lock spring, thick metal washers, a specialized T-bolt guide, and a heavy brass barrel nut. Its vital structural role is to thread directly onto the main clamp band T-bolt, where the spring continuously absorbs intense hydraulic pressure fluctuations from the pool pump, providing a high-tension counter-force that prevents the barrel nut from backing off or loosening over time. By maintaining absolute, uniform perimeter compression around the main tank O-ring, this assembly ensures a permanent watertight and airtight seal for the pressure vessel and acts as a primary fail-safe against catastrophic lid separation. Built to withstand continuous outdoor weathering, intense structural torque, and harsh chemical exposure without rusting or losing its tension capacity, the complete heavy-duty barrel nut and spring assembly carries an individual product and shipping weight of approximately 0.45 pounds (about 7.2 ounces).