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 5965-00-578-8931
NSN 5910-01-547-1752
NSN 5935-00-097-7703
NSN 5920-01-466-4392
NSN 5985-00-708-2193
NSN 6650-00-416-2953
NSN 6610-00-848-4764
NSN 5920-01-027-0660
NSN 5910-01-422-9233
NSN 6645-01-209-6881
NSN 5960-01-163-2266
NSN 2925-01-564-8043