NEMA 4X Gasketed Screw Cover 6X6X4 304 Stainless Steel. Designed for use as a wiring box, junction box, pull box, or terminal box with many indoor and outdoor applications where dust or moisture is a problem. Bodies and covers are fabricated from 304 stainless steel. Seams are continuously welded and ground smooth. Cover contains a closed cell oil resistent neoprene gasket. Ground stud is located on the inside of the cover.