tap drill
Noun
Meaning
tap drill (plural tap drills)
A drill of the correct size to produce the hole for a specified tap size.
The recommended tap drill for a ½"-13 UNC tap is 0.421", resulting in a 75 percent thread.
Noun
tap drill (plural tap drills)
A drill of the correct size to produce the hole for a specified tap size.
The recommended tap drill for a ½"-13 UNC tap is 0.421", resulting in a 75 percent thread.