The PN-1321-MB is a NEMA 4X plastic enclosure box equipped with an external mounting bracket, designed for outdoor and harsh environment protection. The enclosure features a silicone sponge gasket for environmental sealing and includes four threaded brass inserts (M4x0.7) for secure internal component mounting. The body dimensions are 5.118 inches (130 mm) in width and 5.709 inches (145 mm) in height, with a depth of 4.528 inches (115 mm), providing adequate space for electrical components and controls. The box accepts M4 or #8 pan head screws for external mounting, and includes mounting bosses that accommodate M3 x 4mm or #4 x 3/16" self-tapping screws. This NEMA 4X rated enclosure is ideal for outdoor installations, wet environments, and applications requiring corrosion resistance and IP66/IP67 equivalent protection.