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 6105-00-727-3714
NSN 5960-00-204-7506
NSN 5925-01-497-3259
NSN 6240-00-559-3625
NSN 6220-01-359-4857
NSN 7035-01-521-3449
NSN 6610-01-065-1073
NSN 6685-01-486-4992
NSN 6145-01-541-7244
NSN 6130-01-351-8246
NSN 5960-01-476-5686
NSN 5996-01-447-4916