Pentair Terminal Screw 4 Wire | 520108Pentair Terminal Screw 4 Wire 520108 The Pentair Terminal Screw 4 Wire (520108) is a replacement electrical terminal screw assembly used in Pentair load centers and automation control panels. This terminal screw connection provides a secure mounting point for up to four wires, helping ensure solid electrical connections for control circuits, power feeds, or accessory wiring. What This Part Is For This 4 wire terminal screw assembly is designed for use