Leviton offers a large selection of 15, 20, 30 and 50 Amp Commercial Grade Straight Blade Plugs and Connectors, available in a wide variety of features. These rugged performers are moisture, chemical and abuse-resistant. And they???re ideal for indoor and outdoor use. Our EPTR rubber-backed plugs and connectors stand up to rough use, protecting against dirt and moisture. The deep-slotted, backed-out terminal screws draw back wire clamps securely over stripped leads for maximum conductivity.