Item is oil flow window
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 5998-01-164-6833
NSN 5835-01-602-0311
NSN 5999-01-336-7934
NSN 6130-01-222-7684
NSN 6645-01-487-4341
NSN 5935-01-032-4586
NSN 6620-01-421-3917
NSN 6650-01-007-4744
NSN 5998-00-100-0491
NSN 6135-00-635-9187
NSN 5950-01-647-7038
NSN 6130-00-256-7934