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 6105-01-358-0155
NSN 5925-01-574-2972
NSN 5925-00-010-7490
NSN 6685-00-952-2027
NSN 2925-01-327-3069
NSN 7035-01-265-2301
NSN 5930-01-339-0128
NSN 5990-00-880-8225
NSN 6130-01-515-3723
NSN 5920-01-477-0087
NSN 6220-00-777-5223
NSN 6105-00-620-7220