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 7035-00-408-8170
NSN 5935-00-465-0593
NSN 5950-01-086-2236
NSN 6320-01-067-0474
NSN 6105-01-494-3848
NSN 7035-01-029-7221
NSN 2925-01-408-6205
NSN 5996-00-150-7335
NSN 6645-01-176-3372
NSN 5910-00-001-6109
NSN 6135-01-534-3007
NSN 5975-01-339-2519