National Item Identification Number
National Stock Number
Federal Supply Class
A piece of transparent material specifically designed to be placed directly in front of a dial or scale to protect it from foreign matter. It is cut to size and may include a frame. It may have an index line or other marking. See also WINDOW, OBSERVATION; and DIAL, SCALE.
Commercial and Government Entity Code (Supplier Data)
Reference Numbers (Part Numbers)
3.500 INCHES NOMINAL
0.500 INCHES NOMINAL