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 6320-01-054-3046
NSN 5975-00-276-7559
NSN 6130-00-100-0175
NSN 2925-01-444-6676
NSN 2925-00-495-8130
NSN 5996-00-924-0593
NSN 5925-01-628-5538
NSN 6130-01-608-2985
NSN 6110-00-160-1374
NSN 5996-01-411-6195
NSN 5985-01-555-1550
NSN 5855-01-522-0723