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No thread is required for installing the GN 537 fluid level sight glasses.The fluid level sight glass is inserted into the bore d2, tolerance H11. By simply tightening the ring nut using the pin key, the seal is pressed against the contact surface which, at the same time, holds the sight glass in position. For removal, reverse the procedure. Application is limited to non-pressurized or slightly pressurized tanks. Maximum heat resistance: 80&#176; C (175&#176; F).

Aluminum Press Fit Fluid Level Sight Glass w/o Indicator - Fits 38mm (1.50&quot;) Bore - J.W. Winco RD3/A

aluminum-press-fit-fluid-level-sight-glass-w-o-indicator-fits-38mm-1-50-bore-rd3-a

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