National Item Identification Number
National Stock Number
Federal Supply Class
A round, square, or rectangular comparatively flat item having a centrally located hole, designed to accommodate and/or support a shaft. It must have drilled and/or tapped holes for mounting purposes. Excludes RETAINER, PACKING; END BELL, ELECTRICAL ROTATING EQUIPMENT.
Commercial and Government Entity Code (Supplier Data)
Reference Numbers (Part Numbers)
4.500 INCHES NOMINAL
4.000 INCHES NOMINAL