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 6150-01-030-6184
NSN 5930-01-010-8403
NSN 5945-01-392-3583
NSN 5930-00-097-1139
NSN 7035-01-073-5233
NSN 6150-01-519-6921
NSN 6135-01-167-7604
NSN 6105-00-078-5304
NSN 6150-01-415-5148
NSN 6645-00-467-6094
NSN 6685-00-834-6863
NSN 5905-01-123-8993