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 6110-00-112-8796
NSN 5915-01-176-9016
NSN 6150-00-143-5396
NSN 6610-01-647-7412
NSN 6685-01-364-1859
NSN 5915-00-114-0089
NSN 6645-01-217-8809
NSN 5999-00-618-1040
NSN 5985-01-428-4456
NSN 5930-01-291-2866
NSN 6110-01-531-7724
NSN 6610-01-435-4387