A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
NSN 6135-00-998-5884
NSN 5965-01-150-1920
NSN 2925-00-275-1807
NSN 5996-00-193-3459
NSN 5920-00-138-2330
NSN 6220-00-061-8076
NSN 6150-01-555-8477
NSN 6145-01-565-1664
NSN 5835-01-014-4574
NSN 6620-00-992-5876
NSN 2925-01-394-9658
NSN 2925-01-389-6874