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 6145-01-453-7015
NSN 6145-00-087-7065
NSN 5945-00-584-9251
NSN 6240-01-250-3574
NSN 6130-00-596-9565
NSN 5965-01-523-8737
NSN 7035-01-145-5059
NSN 7035-01-022-1008
NSN 5905-01-440-9487
NSN 5895-00-186-8572
NSN 5915-00-576-6395
NSN 5975-01-295-5367