Technical Articles
What Size Drill for 1/4-20 Tap?
Selecting the correct drill bit matters when cutting a thread. For a 1/4-20 UNC cutting tap, #7 is a common chart reference, but the permitted hole depends on the tap and thread specification
Selecting the correct drill bit matters when cutting a thread. For a 1/4-20 UNC cutting tap, #7 is a common chart reference, but the permitted hole