Threading Taps

Threading taps are a tool used to create screw threads (tapping) into a pre-drilled hole, to create a clean fitting for bolts in metals and plastics. Used in engineering and manufacturing, threading taps work like a drill but due to the unique shape of a tap, when screwed into a piece of material, screw threads are created. Threading taps must be used in a predrilled hole and cannot be used for drilling entire holes.


The difference between taps and dies is that taps are used to create or repair threads in holes which is ideal for nuts. Dies are used to cut threads on materials such as steel rods to allow a fitting to be screwed on and attached (threading). The tap is designed for internal thread cutting, so this would be used on the fastener hole or a nut, whereas a die is used for the external thread, like on a bolt. In other words, tapping uses the tap part of the set and creates internal threads and threading is the process used by the die to cut external threads.


Threading Taps are available in HSS (high-speed steel) and carbide and can be used by hand or machine. Our range of threading taps offers the best tool for every machining method or process to meet all your requirements. Threading taps can be used with a tap wrench or power tool and are available in various sizes to accommodate a range of applications.


Taps can be used by machinists in different ways for different applications:


  • Taper taps or starter taps, are used to initially start a new thread with the first 7-10 threads having a flatter profile than those further up the shaft.

  • Plug taps are similar to taper taps but only have 3-5 starting rows ground down leaving more shaft to create a thread.

  • Bottom taps are square in profile with no ground down threads and are used after a taper or plug tap has been used. Their full length cutting shape allow for threads to be cut at the very bottom of a hole for maximum thread length.

  • Spiral flute taps – for blind hole applications

  • Spiral point taps – push chips forward, ideal for through-hole applications

  • Straight flute taps – most commonly, designed for short chipping materials

  • Forming taps – compresses to produce a thread rather than cutting

  • Taps come in both Metric and Imperial dimensions and can have different shank types. Threading taps are used in conjunction with a tap wrench so always consider the maximum side tap your wrench can hold when purchasing.

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Description Price Set Type Thread Size Type Pitch Thread Standard Thread Direction Number of Pieces Overall Length Shank Standard Hand/Machine Tap Material Shank Diameter Shank Type Ring Colour
RS Stock No. 174-0134
Mfr. Part No.L002E002M8XA002
BrandDormer
MYR135.50
1 Set
Set(s)
Threading Tap Set - Spiral Flute - - - 2 - ISO Machine Tap HSS-E - - -
RS Stock No. 813-0275
Mfr. Part No.E255M3
BrandDormer
MYR112.59
Each
units
Threading Tap M3 Spiral Point 0.5mm Metric Right Hand 1 56 mm - Machine Tap HSS 3.5 mm - -
RS Stock No. 813-0207
Mfr. Part No.E239M4
BrandDormer
MYR178.43
Each
units
Threading Tap M4 Spiral Flute 0.7mm Metric Right Hand 1 63 mm - Machine Tap HSS 4.5 mm - -
RS Stock No. 499-334
Mfr. Part No.4405923
BrandEXACT
MYR68.64
Each
units
Threading Tap M5 Spiral Flute 0.8mm Metric Right Hand 7 41 mm - - HSS 0.25 in - -
RS Stock No. 299-8713
Mfr. Part No.E105-M9/0,75
BrandDormer
MYR287.44
Each
units
Threading Tap Set M9 Straight Flute 0.75mm Metric Right Hand 2 63 mm - Hand Tap HSS 7 mm - -
RS Stock No. 813-0297
Mfr. Part No.E255M12
BrandDormer
MYR184.57
Each
units
Threading Tap M12 Spiral Point 1.75mm Metric Right Hand 1 110 mm - Machine Tap HSS 9.0 mm - -
RS Stock No. 299-8915
Mfr. Part No.E105-M18/1,00
BrandDormer
MYR530.34
Each
units
Threading Tap Set M18 Straight Flute 1.0mm Metric Right Hand 2 80 mm - Hand Tap HSS 14 mm - -
RS Stock No. 705-9481
Mfr. Part No.EP01 M6
BrandDormer
MYR111.88
Each
units
Threading Tap M6 Spiral Flute 1.0mm Metric Right Hand 1 80 mm - Machine Tap HSS-XS1 6 mm - -
RS Stock No. 813-0294
Mfr. Part No.E255M10
BrandDormer
MYR164.37
Each
units
Threading Tap M10 Spiral Point 1.5mm Metric Right Hand 1 100 mm - Machine Tap HSS 10.0 mm - -
RS Stock No. 299-9514
Mfr. Part No.E237-M3
BrandDormer
MYR94.98
Each
units
Threading Tap M3 Straight Flute 0.5mm Metric Left Hand 1 56 mm - Machine Tap HSS-E 3.5 mm - -
RS Stock No. 300-0255
Mfr. Part No.E513-M12/1,50
BrandDormer
MYR125.78
Each
units
Threading Tap M12 Straight Flute 1.5mm Metric Fine Right Hand 1 89 mm - Machine Tap HSS 9 mm - -