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 5905-01-514-3260
NSN 6110-01-312-3629
NSN 5925-01-366-1915
NSN 5855-00-903-4305
NSN 6145-01-478-7498
NSN 5930-01-267-7796
NSN 5905-01-263-4692
NSN 5915-01-485-0222
NSN 6110-01-159-2360
NSN 5998-00-422-9031
NSN 6145-01-230-7883
NSN 6240-01-624-7655