L1620P. Turnlok plug 4Wire 20a 3-ph 480V . Quick-thread assembly screws and cord-grip screws come backed-out, ready-to-wire. . Industrial-strength, brass alloy plug blades and connector contacts resist heat rise, provide excellent conductivity. . Raised ribs provide non-slip gripping profile for turning to lock and unlock. . Double dovetail design provides superior protection against cord pull-out forces. . Impact- and corrosion-resistant durable nylon 6 shell material. .