1/4-20NC H3 3 FLUTE HIGH SPEED STEEL SPIRAL FLUTE BOTTOM TAP (1011-8613)

1/4-20NC H3 3 Flute High Speed Steel Spiral Flute Bottom Tap (1011-8613) High speed steel. Ground from solid. Ground thread. 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: 0.02 lbs