National Item Identification Number
National Stock Number
Federal Supply Class
An item, usually made of glass, having fine wires or hairs, or etched or printed fine lines on a surface, and placed in the focal plane of an optical instrument to establish a reference point to the axis for the purpose of aiming, measuring, ranging, and the like. Excludes LENS, OPTICAL INSTRUMENT.
Commercial and Government Entity Code (Supplier Data)
Reference Numbers (Part Numbers)
46.0 ANGSTROMS NOMINAL;