1. 8200. Which of the following statements is/are correct in reference to flare fittings? 1. AN fittings have an identifying shoulder between the end of the threads and the flare cone. 2. AC and AN fittings are considered identical except for material composition and identifying colors. 3. AN fittings are generally interchangeable with AC fit tings of compatible material composition A. 1 B. 1 and 3. C. 1, 2, and 3.