Profile: Thomas Industries, Inc. designs and manufactures close tolerance sheet metal fabrications, stampings & components. Our products include mechanical & electrical enclosures, chassis, frames, brackets, stampings, formed tubes and integrated assemblies. The type I standard hinge enclosure has mounting holes supplied on the back and steel fabricated doors. The type 4X stainless steel clamped cover enclosure is made of 304 stainless steel. It has smooth, continuously welded seams without knockouts, cutouts or holes.