NPT tapered hubs offer protection for conductor insulation. Topaz’s Form 7 Conduit Bodies and Covers are interchangeable with every major brand Form 7 Series. Meets Federal Spec. A-A 50563; NEMA FB1 and NEMA 3R approved raintight when installed with cover and gasket. UL514A and UL514B listed and available in sizes from 1/2” to 4”.