Attributes . The polycarbonate material carries a UL flammability rating of UL94 5V and is suitable for outdoor use. Lid and mounting holes are located outside of the gasket seal. Lid is secured with self captivating M4 stainless steel machine screws (included), threaded into integral stainless steel bushings (for repetitive assembly & disassembly). Heavy duty 16 gauge galvanized steel panels available (see chart) All stainless steel hardware to avoid corrosion caused by dissimilar metals. Gasket is factory poured using high temperature U.L. listed - silicone rubber gasket material. Gasketed lid with two piece tongue & groove construction provides protection against access of oil, dust and water. Internal DIN rail mounting tabs. Threaded (M3) integral brass inserts & standoffs designed for M3.5 or #6 self tapping screws for P.C. board or inner panel mounting in all but the smallest size. Vertical P.C. card guides (for 1.5 mm thick P.C. boards) are molded in all but the smallest size. . Names