18.0 by 2.50
Size18.0 by 2.50
Special Features
- Heat treated and tempered for file hard threads, and longer, useful life
- Designed for hand cutting applications
- Plug style tap is the most commonly used style of tap - 3 to 5 threads chamfered at tip
- Use 41/64" drill bit for best results
- SP stands for spark plug threads
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