Hanson Carbon Steel Bottom Tap 1/4"-20 Thread

Hanson's high strength taps are useful for any number of machining projects, threading the interior surface of a hole to correspond with the desired thread pitch of a given screw, bolt or other part. This bottom tap has a very slight chamfer (tapered cutting edge) that is 1 to 2 threads in length, followed by a continuous cutting edge that enables the tap to cut threads to the very bottom of a blind hole. Lacking a proper taper to successfully start into an untapped hole, the bottom tap is best