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Product ID : 133ZVP
133ZVP Del-Seal Zero Profile, Wide-Angle Viewport, Viewing Diam.=0.625, Flange Size=1 1/3, Flange OD (A)=1.33, Bolt Circle Diam. (B)=1.062, Flange Thickness (C)=0.285, Glass Thickness=0.062
Description
More details on associated web page:
Del-Seal Viewports
7056 Glass with Kovar sleeves and stainless steel flanges.

Features Viton® O'Ring and 72 mesh screen.

O-Rings are available in five different materials from Scientific Instrument Services.

Replacement or spare O-rings for centering rings.

Three NW flanges permit the union of several pump lines.