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: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
NSN 2925-01-043-9786
NSN 5855-00-861-0006
NSN 5950-01-006-2809
NSN 5905-01-616-4892
NSN 6240-01-592-4068
NSN 2925-00-886-4718
NSN 2925-01-411-8002
NSN 7035-00-753-0695
NSN 5935-01-040-4586
NSN 5945-00-900-3932
NSN 5965-01-534-7152
NSN 7035-01-122-1264