Left Hand Taps - Machine Screw Size & Fractional
Regal Tools offers an extensive inventory of coated left-hand machine screw taps and fractional taps in a variety of different sizes and configurations. Left-hand tap coatings are offered in titanium nitride as well as a variety of other coatings which can be customized according to the needs of your job. See our Popular Special Tap Category for left-handed fractional and machine screw taps not included in the Common National Coarse or National Fine Series.
- General-purpose tap used either by hand or on production machines
- Precision ground for a wide variety of applications
- Proper number of flutes to provide sufficient chip room and cutting edges to handle most threading jobs
- Manufactured to Table 302/303 standards
We offer a range of left-hand machine screw, fractional, and metric sizes from #6 to “1 ½ and M3.5 to M24 as standard and are available with taper, plug, or bottom chamfer. The tapering of the threads at the front end distributes the cutting action over several teeth. When the tapering amounts to 7 to 10 threads, the tap is called a “taper” tap; 3 to 5 threads a “plug tap”; and 1 to 2 threads a “bottoming” tap.
Standard left-hand machine screw taps and fractional taps are made from high-speed steel in a wide variety of flute configurations and comply with ANSI (American National Standards Institute) standards. A choice of “H limits” is available to produce the class of fit needed for inch dimension tools. We also offer taps that conform to ANSI thread specifications with DIN length dimensions. Need a custom or special left-hand tap? Our special taps are available to ship in 24 hours so request one today!