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. 152-198
BrandRS PRO
SGD22.03
Each
units
Threading Tap M16 Second, Straight Flute 2.0mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 174-0125
Mfr. Part No.L002E000M5XA002
BrandDormer
SGD34.63
1 Set
Set(s)
Threading Tap Set - Spiral Point - - - 2 - ISO Machine Tap HSS-E - - -
RS Stock No. 299-8684
Mfr. Part No.E105-M7/0,75
BrandDormer
SGD93.64
Each
units
Threading Tap Set M7 Straight Flute 0.75mm Metric Right Hand 2 56 mm - Hand Tap HSS 6 mm - -
RS Stock No. 300-0334
Mfr. Part No.E513-M18/1,00
BrandDormer
SGD122.95
Each
units
Threading Tap M18 Straight Flute 1.0mm Metric Fine Right Hand 1 112 mm - Machine Tap HSS 14 mm - -
RS Stock No. 152-249
BrandRS PRO
SGD22.03
Each
units
Threading Tap M16 Plug, Straight Flute 2.0mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 455-914
BrandRS PRO
SGD23.28
Each
units
Threading Tap 5/16-18 Spiral Point - UNC - 1 72 mm - - HSS 8 mm - -
RS Stock No. 240-3192
Mfr. Part No.E500 5.0 X 0.80 3FL TPR
BrandDormer
SGD22.45
Each
units
Threading Tap M5 Straight Flute, Taper 0.8mm Metric Right Hand 1 58 mm - Machine Tap HSS 5 mm - -
RS Stock No. 269-5565
Mfr. Part No.E100 7N8
BrandDormer
SGD81.24
Each
units
Threading Tap Set M7 Straight Flute 1.0mm Metric Right Hand 3 56 mm - Hand Tap HSS 6 mm - -
RS Stock No. 152-136
BrandRS PRO
SGD27.73
1 Set
Set(s)
Straight Flute Tap 1/4 in BSW Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 499-340
Mfr. Part No.4405926
BrandEXACT
SGD26.39
Each
units
Threading Tap M10 Spiral Flute 1.5mm Metric Right Hand 7 59 mm - - HSS 0.25 in - -
RS Stock No. 522-7553
BrandRS PRO
SGD25.98
Each
units
Threading Tap M8 Second, Straight Flute 0.75mm Metric Fine - 1 66 mm - - HSS 6.3 mm - -
RS Stock No. 300-0198
Mfr. Part No.E513-M10/1,00
BrandDormer
SGD35.46
Each
units
Threading Tap M10 Straight Flute 1.0mm Metric Fine Right Hand 1 80 mm - Machine Tap HSS 10 mm - -
RS Stock No. 499-334
Mfr. Part No.4405923
BrandEXACT
SGD22.60
Each
units
Threading Tap M5 Spiral Flute 0.8mm Metric Right Hand 7 41 mm - - HSS 0.25 in - -
RS Stock No. 299-9902
Mfr. Part No.E500-M16/2,00
BrandDormer
SGD52.98
Each
units
Threading Tap M16 Straight Flute 2.0mm Metric Right Hand 1 102 mm - Machine Tap HSS 12.5 mm - -
RS Stock No. 705-9475
Mfr. Part No.EP01 M3,5
BrandDormer
SGD37.51
Each
units
Threading Tap M3.5 Spiral Flute 0.6mm Metric Right Hand 1 56 mm - Machine Tap HSS-XS1 4 mm - -
RS Stock No. 705-9438
Mfr. Part No.EX01 M2,5
BrandDormer
SGD53.06
Each
units
Threading Tap M2.5 Spiral flute 0.45mm Metric Right Hand 1 50 mm - Machine Tap HSS-E 2.8 mm - -
RS Stock No. 813-0235
Mfr. Part No.E240M6
BrandDormer
SGD42.87
Each
units
Threading Tap M6 Spiral Point 1.0mm Metric Right Hand 1 80 mm - Machine Tap HSS-E-PM 6.0 mm - -
RS Stock No. 813-0308
Mfr. Part No.E260M6
BrandDormer
SGD50.04
Each
units
Threading Tap M6 Spiral Flute 1.0mm Metric Right Hand 1 80 mm - Machine Tap HSS 6.0 mm - -
RS Stock No. 171-2462
Mfr. Part No.K-437-5
BrandHozan
SGD11.30
Each
units
Threading Tap M5 Taper 0.8mm Metric - 1 - - - - - - -
RS Stock No. 828-173
BrandRS PRO
SGD19.80
Each
units
Threading Tap M8 Hexagon Drive Tap - Metric - 1 - - - HSS - - -