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 5975-01-281-8347
NSN 5925-00-453-9929
NSN 5910-00-786-6223
NSN 5920-01-584-4478
NSN 5999-00-063-8248
NSN 6150-01-420-6494
NSN 6610-00-524-0118
NSN 5930-01-051-3059
NSN 5999-00-542-0541
NSN 5855-01-020-7982
NSN 5915-01-512-8851
NSN 5998-01-464-9935