Century Drill and Tool Carbon Steel Plug Tap 5/16-18 NC (0.31-18 National Coarse)
- Precision cut threads, accurately formed for consistent, exact threading
- 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
- Best drill: F
