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 6610-00-710-0993
NSN 5905-00-931-8981
NSN 5835-01-424-0054
NSN 6645-00-072-9243
NSN 5950-01-463-3606
NSN 2925-01-027-1293
NSN 6110-01-167-8906
NSN 5999-01-148-8320
NSN 6110-01-554-5026
NSN 5935-01-139-5246
NSN 5920-01-287-8409
NSN 5835-01-384-3206