Smooth, rounded integral bushings in hubs protect conductor insulation|Accurately tapped, tapered threads for tight, rigid joints and excellent ground continuity|Roomy interiors provide more wiring space|Furnished with four tapped holes and two close-up plugs, boss in rear of box allows for fifth entry, factory or field entries, 1/two or three/4 in|Suitable for exposed or concealed installations|Malleable iron bodies have high tensile strength and ductility, provides great resistance to corrosion, impact and shock|Copper-free aluminum boxes are lightweight, self-oxidizing, self-renewing and offer a high corrosion resistance|Enclosed and gasketed boxes when used with hub or blank covers provide CSA type 4 fit, when used with a gasket, BKX junction boxes are weatherproof|BKX junction boxes suitable are for use in grain elevators, flour mills and other environments where dust presents a hazard|Cushion fixture hangers are enclosed and gasketed|Can be fitted with terminal block