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: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 6645-01-273-2462
NSN 5996-01-514-9292
NSN 5935-01-451-4297
NSN 6685-01-578-7668
NSN 6320-01-116-3980
NSN 6685-01-411-5651
NSN 7035-00-064-7008
NSN 5910-01-144-1141
NSN 5895-01-657-8771
NSN 5905-01-425-7766
NSN 5960-00-632-3217
NSN 5930-00-478-3104