5/16-18 Bottoming Tap for threaded insert installation. After drilling a 9.5mm deep hole with an "F" drill (.257" diameter), the tap is used to cut threads all the way to the bottom of the hole to install the insert. A standard tap won't cut threads all the way to the bottom, and not all bottoming taps cut as deeply. This one is easier to tap straight because it has four flutes, is designed for cutting wood or metal, and cuts all the way to the bottom of the hole. Fits in the Tap Handle offered on our site if you need one. fits 1/4" tap handles.
Posted by Eli Sand on 31st Aug 2022
No choice but to get this if you don't have one already and you're using the inserts. Does what it's designed to do. Precision machined and sharp. Taps the hole perfectly.
Not your standard tap; the end isn't tapered and taps the same thread size right from the start. Don't try to use your own taps!
Posted by Unknown on 26th Dec 2017
Obviously you've got to be careful with this, but it's a great tap that still looks like new after tapping 2 sets of skis. I expect it to last for a long time.