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 2925-01-144-7106
NSN 5945-00-803-3076
NSN 5925-00-027-8220
NSN 5965-00-989-6936
NSN 5965-01-285-9934
NSN 5835-01-442-6482
NSN 6130-01-466-0182
NSN 5915-01-086-1784
NSN 5915-01-483-1617
NSN 6610-00-557-8271
NSN 5855-01-087-1417
NSN 5960-00-874-0507