Leviton 2620-IG 30 Amp, 250 Volt, Flush Mounting Locking Receptacle, Industrial Grade, Isolated Ground, V-0-MAX, Orange UL 94 V-O Flammability Rating, The Best Rating of any Material Used in Industrial Locking Flush Receptacles Available Today Extra-Thick.050-Inch Nickel-Plated Brass Mounting Strap for High-Abuse Applications Designed for Maximum Durability: One-Piece .040-Inch Brass, High Copper-Content Contacts with Nickel-Plated Clamp-Type Terminals Color-Coded Voltage Rating on Face for Easy Identification UL V-0 flammability rating