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Century Drill and Tool Carbon Steel Plug Tap 4-40 NC (4-40 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: 43
