Everything needed to cut a 4.0 x 0.70 metric thread in one package: the tap plus the correct-size drill bit for the hole it threads. Buying them matched means no guesswork at the drill index and no undersized or stripped threads.

• Metric tap and its matching drill bit packaged together
• Thread size: 4.0 x 0.70 - 4.0 mm nominal diameter, 0.70 mm pitch
• Best drill: #30 - the correct tap drill size for this thread
• Precision cut internal threads, accurately formed for consistent, exact threading
• Heat treated and tempered for file hard threads and a longer, more useful life
• Plug style tap, designed for hand cutting applications in a tap wrench

Tip: Drill the hole with the included bit first, then start the tap square to the surface and back it off a half turn now and then to clear chips.