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 5985-00-753-1397
NSN 5999-01-442-4750
NSN 6645-01-250-0478
NSN 6130-01-293-3673
NSN 5910-00-391-5250
NSN 6620-00-313-9237
NSN 5975-00-481-3681
NSN 6110-01-240-7618
NSN 2925-01-423-8141
NSN 5920-00-226-7148
NSN 5915-01-506-0229
NSN 5925-00-624-0406