1
Q
tapered end of a tap that helps start threads smoothly
A
Chamfer
2
Q
grooves in the tap that allow chips to escape during cutting.
A
Flute
3
Q
hole that goes completely through the material.
A
Through hole
4
Q
hole that does not go all the way through
A
Blind hole
5
Q
distance between threads, measured in mm or threads per inch (TPI)
A
Thread pitch
6
Q
standard size of the tap or thread.
A
Nominal size
7
Q
distance the thread extends into the hole
A
thread depth
8
Q
angle of spiral cutting edges, which affects chip removal
A
Helix angle
9
Q
gradual reduction in diameter at the start of a tap
A
Taper
10
Q
tap with medium taper used to continue threads
A
Plug
11
Q
tap with minimal taper to cut threads to the bottom of a blind hole
A
Bottoming
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