We are a diversified global manufacturer and provider of products for customers in the consumer products, aerospace, industrial, petrochemical, refinery, and oil and gas end markets. Our wide range of innovative product solutions are engineered and designed to solve application-specific challenges that our customers face. We believe our businesses share important and distinguishing characteristics, including: well-recognized and leading brand names in the focused markets we serve; innovative product technologies and features; customer approved processes and qualified products; established distribution networks; relatively low ongoing capital investment requirements; strong cash flow conversion and long-term growth opportunities. We manufacture and supply products globally to a wide range of companies, with approximately 80% of our 2018 revenue generated from sales into North America. In addition, we generated more than 50% of our 2018 revenue from sales to less cyclical consumer product and aerospace markets.
During 2018, our net sales were $877.1 million, operating profit was $122.1 million, and net cash provided by operating activities was $129.3 million.
TriMas operates businesses in three reportable segments: Packaging, Aerospace and Specialty Products. Our brands include Rieke® (reported in Packaging); TriMas Aerospace™, Monogram Aerospace Fasteners™, Allfast Fastening Systems®, Mac Fasteners™ and Martinic Engineering™ (reported in Aerospace); and Lamons,® Norris Cylinder,™ and Arrow® Engine Company (reported in Specialty Products). We believe TriMas is uniquely positioned because of a number of competitive strengths, including: