Square, white abs plastic perimeter with 6.0 in. Round clear plastic screw-in center piece w/ rubber o-ring.
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 6130-00-244-3275
NSN 6645-01-545-2954
NSN 5975-01-044-0159
NSN 5915-01-303-2662
NSN 6110-01-418-2578
NSN 5855-01-271-6617
NSN 5999-01-475-7615
NSN 7035-00-299-7150
NSN 6650-00-226-7099
NSN 5915-01-258-5799
NSN 5835-01-307-8954
NSN 6145-00-275-4016