Precision Cut Threads: Century Drill & Tool’s carbon steel tap boasts precision-cut threads, ensuring accurate and consistent threading every time. Perfect for detailed and high-precision tasks, this tap provides a flawless finish for professional results | Heat Treated and Tempered: Designed for durability, the tap undergoes heat treatment and tempering, producing file-hard threads that offer a longer useful life. This process enhances the tap's resilience and maintains its sharpness over extended use | Ideal for Hand Cutting Applications: Specifically crafted for hand cutting applications, this carbon steel tap delivers exceptional control and accuracy. It's perfect for manual threading tasks, providing a reliable and efficient solution for various projects | National Fine Threading Standard: Featuring National Fine threading, this tap is ideal for creating finely threaded results. Its precisely formed threads ensure consistent and exact threading, making it suitable for detailed and precise work | Optimal Drill Compatibility: For the best performance, pair this carbon steel tap with a size 7 drill. This combination ensures optimal results, enhancing the tap's effectiveness and efficiency in your threading tasks