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 5999-00-633-7592
NSN 5930-01-059-8611
NSN 5950-00-345-8801
NSN 5855-01-346-7682
NSN 5945-01-184-5356
NSN 6145-01-273-1714
NSN 5855-00-631-4565
NSN 6110-01-304-0208
NSN 5930-00-018-5407
NSN 5910-01-211-6936
NSN 5835-00-864-4481
NSN 5935-01-535-7211