High Speed Steel
Ground Thread
RH & LH Threads

Straight Flute
2, 3, 4 and 6 Flute

Machine Screw and
Fractional Sizes

Besly Popular Special Straight Flute Taps are for general use in production tapping or hand operations. They are available in taper, plug and bottoming chamfer styles and special pitches NS and NEF. Choose Catl No. 4115 or Catl No. 4115LH (left hand thread) for machine screw sizes #2-56 and up and Catl No. 4111 or Catl No. 4111LH for fractional sizes up to 3".

High Speed Steel
Ground Thread
RH & LH Thread

Straight Flute
2, 3, 4 and 6 Flute

Metric Sizes

Besly Popular Special Straight Flute Taps are available in taper, plug and bottoming chamfer styles. Catl No. 4124 and Catl No. 4124LH (left hand thread) are manufactured by Besly in sizes M1.6 to M42 to meet the growing demand for metric taps.

High Speed Steel
Ground Thread
RH & LH Thread

Spiral Pointed
2 and 3 Flute

Machine Screw,
Fractional and
Metric Sizes

Besly Popular Special Spiral Pointed Taps have angular flutes at the front end of the tap to propel the chips ahead of the tap. This feature plus the excellent shearing action of the flute make spiral pointed taps ideal for production tapping of thru holes. These tools are available in machine screw (Catl No. 4125 or Catl No. 4125LH), fractional (Catl No. 4120 or Catl No. 4120LH) and metric (Catl No. 4134) sizes ranging from #00-90 to 1". Special pitches NS and NEF are also available.

High Speed Steel
Ground Thread

Spiral Flute
2 and 3 Flute

Machine Screw,
Fractional and
Metric Sizes

Besly Popular Special Spiral Flute Taps are designed for easy removal of chips from blind holes and for tapping holes in which a keyway or opening must be bridged by the tap lands. These taps have 30 degree spiral flutes. Choose Catl No. 4113 for machine screw and fractional sizes and Catl No. 4133 for metric sizes.

High Speed Steel
Ground Thread
RH & LH Threads

Straight Flute
4, 5 and 7 Flute

Fractional Sizes

Besly Popular Special Straight Flute Taper Pipe Taps come in many catalog styles to suit every need. These are Medium Angle Pipe Taps and may be used in most materials under average conditions. Select Catl No. 3165 (NPT) or Catl No. 3166 (NPTF) for right hand threads, or Catl No. 3166LH (NPTF) for left hand threads. Many of the right hand tools are also available as 4, 6, 8 and 10" extension taps.

High Speed Steel
Ground Thread
Interrupted Threads

Straight Flute
5 and 7 Flute

Fractional Sizes

These Besly Popular Special Taper Pipe Taps are made with interrupted threads for use in soft or stringy metals. The removal of every other tooth helps to break the chip and permits a larger supply of lubrication to reach the cutting teeth, thus helping to eliminate torn threads. They are also available as 6" extension taps.

High Speed Steel
Ground Thread

Fast Spiral Flute
4 Flute

Fractional Sizes

Besly Popular Special Turbo Cut® Taper Pipe Taps generate round and smooth threads in pipe connections to prevent leaks.  Secondary chip cleaning operations are not needed.  For use in most metals, including nonsulfurized steels, stainless steels and diecast metals.  These taps have 30 degree spiral flutes and are available in Catl No. 3162 (NPTF) in sizes 1/8" to 3/4".

High Speed Steel
Ground Thread

Straight Flute
4 and 5 Flute

Fractional Sizes

Besly Popular Special Straight Pipe Taps (NPSI) are used primarily for tapping internal straight threads in intermediate automotive threading.

High Speed Steel
Ground Thread (GH7)

Straight Flute
3 and 4 Flute

Machine Screw Sizes

These Besly Popular Special Straight Flute Oversize Taps cut slightly oversize to accommodate platings, for preheat treatment conditions or to provide greater wear life in abrasive materials.

High Speed Steel
Ground Thread (GH7)

Straight Flute
2 Flute

Machine Screw Sizes

These Besly Popular Special Spiral Pointed Oversize Taps are slightly oversize for production tapping of through holes which are to be plated or for preheat treatment conditions.

High Speed Steel
Ground Thread
RH & LH Threads

Straight Flute
4, 5, 6, 7 and 9 Flute

Fractional Sizes

Besly Popular Special ACME Taps are commonly used in valves, jacks, presses or machine tools using traverse motion. These ACME threads are a 29 degree inclusive angle and are available in right hand and left hand threads. Choose tandem style ACME taps to provide roughing and finishing operations in one pass.