Pentair #6 x 3/8" Phillips Truss Head Lock Screw

The Pentair #6 x 3/8" Phillips Truss Head Lock Screw (part number R172375) is a precision-engineered structural fastening component designed for small internal locks, sub-assemblies, and specialized chemical distribution setups across various Pentair pool and spa systems. It is most prominently utilized within the lock spring mechanisms of Pentair Rainbow high-capacity automatic chlorinator/brominator feeders (such as models HC-3315, HC-3330, and HC-3340), as well as inside Dynamic Series II, III, and V inline cartridge filter and safety wall skimmer assemblies. Formed from premium, marine-grade stainless steel to prevent rust and degradation in harsh chemistry, this screw features a #6 thread diameter, a compact 3/8-inch overall shaft length, and a wide, low-profile truss head. The broad bearing surface of the truss head maximizes surface area contact to distribute torque evenly, establishing a firm mechanical lock that prevents component shifting or backing out from pump vibrations or standard system operating pressures up to 50 PSI. Engineered to be continuously exposed to dynamic water flow and highly concentrated pool sanitizers like liquid chlorine, bromine, and salt-generator cell outputs, it resists chemical brittleness and thread-stripping over years of operation. Due to its ultra-compact, solid metal geometry, this individual hardware component carries a nominal product and shipping weight of approximately 0.01 to 0.02 pounds (about 0.16 to 0.32 ounces).