Pentair Challenger Base Screw, SS, 5/16x1/2in, 355335
No. 15 Image 355335 Screw, 5/16 in., 18 x 1/2 in. Stainless Steel Hex Washer Head, 2 Required Used on Pentair Challenger and Waterfall pumps to secure the pump to the base. Use two (2) per pump. See all Pentair PacFab Challenger & Waterfall pool pump parts in our parts department.