NS Group, Inc. (NYSE: NSS)

NS Group hopes its line of pipe creates a pipeline of profits. The company's subsidiaries make seamless and welded tubular products that are used in oil and gas exploration and production and in pipelines. The company's drilling and production products -- known as oil country tubular goods, or OCTG -- include drill pipe, casing, and production tubing. Its seamless and welded line pipes are used by natural gas utilities and transmission companies. NS Group sells its products primarily to distributors rather than directly to end users. Top customers include Bourland and Leverich Supply, which accounts for more than 30% of sales, Pyramid Tubular Products (12%), and Champions Pipe & Supply (11%).