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 5855-01-582-2111
NSN 2925-01-079-6229
NSN 5905-01-356-9242
NSN 7035-01-585-7501
NSN 6650-00-146-5434
NSN 6610-01-435-4387
NSN 2925-01-014-0118
NSN 6135-00-351-8606
NSN 5935-00-476-6837
NSN 5920-01-179-5289
NSN 5920-01-495-4871
NSN 5985-00-277-0575