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 6150-01-480-7042
NSN 5835-00-155-1379
NSN 6105-00-870-4023
NSN 6145-00-517-6666
NSN 5965-00-201-7479
NSN 6145-01-224-8325
NSN 5925-01-649-3384
NSN 6645-00-716-8049
NSN 5999-00-934-8747
NSN 5925-01-502-9089
NSN 6320-00-036-3688
NSN 6610-01-614-7191