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 5950-01-340-7523
NSN 5965-01-156-7013
NSN 5855-01-156-0417
NSN 5950-01-227-2466
NSN 6685-01-485-0389
NSN 5950-00-169-6082
NSN 5920-01-349-5168
NSN 6650-01-434-0331
NSN 5905-01-221-0651
NSN 5835-01-178-4154
NSN 6610-01-612-9890
NSN 5835-01-332-2867