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 7035-01-328-7448
NSN 5975-00-489-3839
NSN 6685-00-588-4348
NSN 5835-01-237-8486
NSN 5960-01-013-9346
NSN 5920-01-363-1426
NSN 6130-01-213-3897
NSN 5998-01-368-0483
NSN 6150-01-275-8463
NSN 6105-00-905-7911
NSN 5950-01-234-1532
NSN 5930-01-160-5623