Union Coupling Elbow Nylon Gages can be used on oil bearings, gear boxes, crank cases, transformers, switches, or any application requiring visual indication of liquid flow. The leak proof construction, large vent hole and unrestricted passages permit fast and accurate liquid level response.","The square shank with pipe thread screws into a tapped hole on the side of a reservoir. A full rotational clearance is not necessary; the union coupling is installed without rotating the entire gage.","This liquid level gage features a round Trogamid nylon sight that is 11\/16\" in diameter. The sight is extremely durable and allows viewing from all angles. A protected vent hole in the cap reduces the possibility of dust, dirt, or moisture getting inside the gage. The gage uses only atmospheric pressure. Leak-tight construction is achieved with Buna-N seals. The vent cap and body are made of aluminum alloy. The unit tolerates temperatures up to 205° F.","Dimensions:","A Sight Opening 4 1\/2\"","B Height from Center of Mounting Hole 5 27\/32","C Total Length of Base 2 23\/32