Heat resistant
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 4140-01-510-8707
NSN 6135-01-339-8064
NSN 5945-00-577-2817
NSN 6645-00-947-0625
NSN 6610-01-417-3011
NSN 5990-01-426-2037
NSN 5905-01-146-9192
NSN 6645-00-522-4173
NSN 6645-01-466-2083
NSN 5925-01-592-3077
NSN 5985-01-062-2123
NSN 5960-01-584-9452