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 6650-01-056-4632
NSN 6610-01-613-5689
NSN 5935-01-188-3522
NSN 6645-01-206-4888
NSN 6145-00-366-5790
NSN 5920-01-461-3214
NSN 6685-01-203-9792
NSN 4140-01-076-9775
NSN 6645-01-190-0085
NSN 5945-00-369-8185
NSN 6650-01-008-6080
NSN 5965-00-578-8931