Surface MountingNEMA 6P - NEMA 4X - NEMA 6 - NEMA 4- NEMA 3RCast Iron - Hot Dipped GalvanizedThird Party Certification: UL File E 189027Standard Construction:1.Box and plain cover of cast iron.2.Stainless steel machine screws.3.Neoprene gasket.4.Flange and back of cover ground flat before galvanizing.Available Extras:1.Drilling only. Drilling and tapping.2.Bosses for five threads. Special gaskets.3.Mounting lugs.4.Plain brass or checkered bronze covers.5.Interior mounting buttons tapped blind.H8000 type boxes feature wide flanges that provide ample contact with cover and gasket to insure tightness even under widely varying temperature and climatic changes. Flange widths are graduated from a minimum of three quarters of an inch on small boxes to a width of one and a half inches on large boxes. Screws are properly spaced to make these boxes weathertight under severe natural forces of driving rain, snow, sleet or drippage.Conduit entrances of five tapped threads for raintight requirements usually require bosses.Mounting lugs afford easier installation and add sturdiness to the conduit system.For Class II, Groups E, F and G hazardous locations, H8000 Type Boxes for class II, (Groups E, F, and G) Hazardous locationsClass II, Groups E, F and G hazardous locations are ones in which explosive mixtures of air with metal dust (Group E), or carbon, coke or coal dust (Group F), or grain dust (Group G), are encountered. Enclosures with adequate flanges, mechanically held gaskets of proper composition, and bossed and tapped conduit entrances with five threads will meet Class II requirements.All H8000 type boxes listed above will conform to these requirements when ordered specifically as follows:1.With gasket of vellumoid: Specify "Mechanically Attached" (Extra 10%)2.With bossed and tapped conduit entrances of five threads Mounting Lugs3.Mounting lugs are optional, but mounting holes through box are not permissible. See further listing on Class II boxes, under Metal Pipe and Pole Bases and under Explosion Housing.H5400 and H5600 type and H6000 type boxes for Class I, Groups C and D hazardous location are listed under Explosion Housing.