5/16-18NC H3 3 Flute High Speed Steel Spiral Flute Bottom Tap (1011-8615)
Ground thread.
High speed steel.
Ground from solid.
A bottoming tap has 1-2 lead threads ground. They are used for continuing to thread a blind hole close to the bottom of the hole. It's difficult to start threading a hole with this tap.
Bottoming taps are not necessarily flat on the bottom, they sometimes have a 60 degree tapered point from the manufacturing process.
Shipping Weight: 0.05 lbs
Many metalworking products contain metals that are included in
the latest Prop 65 warning. Exposure to the elements can be
harmful. May cause cancer and reproductive harm.
