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 5960-01-273-7044
NSN 5945-00-127-4828
NSN 5990-01-507-7495
NSN 5985-01-042-3426
NSN 6130-01-400-6123
NSN 6645-00-022-8691
NSN 5905-00-753-9731
NSN 5945-00-405-3976
NSN 5998-01-463-8718
NSN 2925-01-344-0281
NSN 5945-01-026-1231
NSN 7035-01-042-0527