National Oil Well Supply

National Oil Well Supply is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Oil Field Equipment & Supplies

North American Industry Classification System (NAICS) Categories:

• Industrial Machinery And Equipment Merchant Wholesalers > Petroleum Industry Machinery > Oil Field Equipment & Supplies

Standard Industry Classification (SIC) Categories:

• Industrial Machinery & Equipment > Petroleum Industry Machinery > Oil Field Equipment & Supplies