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 6145-00-596-8447
NSN 6145-01-120-0918
NSN 5960-01-009-5983
NSN 6320-01-150-5378
NSN 6220-00-331-7291
NSN 6610-01-055-4147
NSN 5985-01-099-6263
NSN 5935-01-352-6309
NSN 5998-00-191-5303
NSN 5930-01-023-2160
NSN 6685-01-422-4241
NSN 6105-00-152-9659