Fractional Tap, Plug Style, 5/16-18 National Coarse

5/16-18 national coarse plug style fractional tap. precision cut threads, accurately formed for consistent, exact threading. heat treated and tempered for tile hard threads, and longer, useful life. designed for hand cutting applications.

• Heat treated and tempered for file hard threads and longer useful life
• Designed for hand cutting applications
• The plug style tap is the most commonly used style of tap with 3 to 5 threads chamfered