Stress relief annealed
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 5999-00-627-4316
NSN 6135-01-534-3007
NSN 5925-01-517-7229
NSN 6110-01-411-6000
NSN 6150-01-152-1814
NSN 6650-01-079-1608
NSN 7035-01-353-4048
NSN 5990-01-571-7468
NSN 5905-00-021-7900
NSN 6110-00-935-5351
NSN 6610-00-200-8832
NSN 6145-01-377-5130