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 2925-00-404-6461
NSN 5985-00-275-2830
NSN 5975-01-327-1986
NSN 5835-01-047-8343
NSN 5996-00-207-6086
NSN 6645-01-052-8331
NSN 6240-01-265-5039
NSN 5910-01-212-6775
NSN 5935-00-862-3306
NSN 6220-01-415-4164
NSN 6220-01-485-2381
NSN 6620-01-298-3806