The Triumph Twist Drill Co. Fractional Carbon Bottom Tap, 9/16-18 Thread (brand part no. DWT54767) finishes a threading job that a taper or plug tap can’t complete on its own. Triumph Twist Drill Co. cuts this carbon steel tap with a bottoming style, meaning it carries full-form threads almost all the way to its tip, so it can cut usable threads to the very bottom of a blind hole where a tapered starting tap would leave the last few threads incomplete. For gunsmithing work like threading a barrel for a muzzle device or tapping a mounting hole that doesn’t go all the way through, a bottom tap like this one is often the piece that finishes the job cleanly. It ships as a single tap sized to the 9/16-18 thread.

Key Specifications

• Cuts a 9/16-18 thread.
• Uses a bottoming tap style to finish threads to the base of a blind hole.
• Made from carbon steel.
• Ships as one tap.

Frequently Asked Questions

What does a bottom tap do that a taper tap doesn’t? A bottom tap carries full threads almost to its tip, finishing threads to the base of a blind hole where a taper tap would leave the last threads incomplete.

What thread size does this tap cut? 9/16-18.

Buy the Triumph Twist Drill Co. Fractional Carbon Bottom Tap

Finishing a blind hole’s threads cleanly takes the right tap for the job. Order one from our gunsmithing tools and supplies selection at our Lubbock, Texas gun shop for fast shipping.