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 6130-00-113-3430
NSN 6650-01-110-2142
NSN 5920-01-104-4332
NSN 6220-01-004-8909
NSN 5998-01-438-5695
NSN 5998-00-845-4873
NSN 6320-01-084-8821
NSN 5985-00-131-6751
NSN 5905-00-324-1957
NSN 6620-01-201-8221
NSN 5910-01-433-3265
NSN 6320-00-511-7331