GN743-11-G3/8-A Oil Sight Glass, J.W. Winco, Mfr#: 743-11-G3/8-A

GN 743 Fluid level sight glasses offers a variety of features such as genuine glass of high stability and scratch proof and sealing with an O-ring on the periphery and not on the face edge of the glass. Leak tightness is therefore not affected by axial pressures. The seal is housed in a groove and it can therefore not be lost. In addition, this groove prevents the seal from being extruded when the sight glass is tightened. The location of this seal allows also the softer elastomer which guarantees better and easier sealing.