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 6135-00-112-8637
NSN 5985-00-526-0154
NSN 5998-01-611-0213
NSN 6105-00-990-4795
NSN 5945-00-777-1479
NSN 5960-00-886-6555
NSN 6145-01-451-4014
NSN 5990-01-138-8981
NSN 6620-00-229-2728
NSN 6645-00-607-3198
NSN 5925-01-589-3658
NSN 5996-00-484-9196