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 5930-00-803-7572
NSN 6135-01-428-6069
NSN 5920-01-115-1739
NSN 6685-00-155-4301
NSN 5895-00-288-0158
NSN 6110-01-087-0439
NSN 5855-01-289-4650
NSN 6645-01-241-2294
NSN 6105-01-435-4376
NSN 5895-00-081-3293
NSN 5945-01-271-7456
NSN 5935-00-230-0330