Accurately tapped, tapered conduit threads for tight, rigid joints and ground continuity|All conduit hubs and openings provide a minimum of five full threads to meet UL requirements|Provided with mounting lugs and covers|O-rings standard to provide raintight fit|GUBBM junction boxes serve as an enclosure for meters, gauges and similar devices|Complete with round, explosionproof glass window cover, permits direct reading of enclosed instrument|Furnished with one 3/4 in drilled and tapped entry|Mounted bosses provided in back of GUBBM can be drilled and tapped for fastening of instrument mounting bracket