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. 152-047
BrandRS PRO
SGD9.33
Each
units
Threading Tap M3.5 Straight Flute, Second 0.6mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 669-9394
BrandRS PRO
SGD66.46
1 Set
Set(s)
1/4 in Hexagon Drive Tap M10 1/4 in Hexagon Drive Tap - - - 6 - - - HSS - - -
RS Stock No. 152-205
BrandRS PRO
SGD18.06
Each
units
Threading Tap M16 Straight Flute, Taper 2.0mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 152-075
BrandRS PRO
SGD11.91
Each
units
Threading Tap M3 Straight Flute, Second 0.5mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 455-964
BrandRS PRO
SGD21.91
Each
units
Threading Tap 3/8-16 Spiral Point - UNC - 1 80 mm - - HSS 10 mm - -
RS Stock No. 152-227
BrandRS PRO
SGD15.61
Each
units
Threading Tap M12 Straight Flute, Second 1.75mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 669-9404
BrandRS PRO
SGD104.99
1 Set
Set(s)
Threading Tap Set - - - - - 12 - - - HSS - - -
RS Stock No. 151-987
BrandRS PRO
SGD22.39
Each
units
Threading Tap M6 Spiral Flute, Second 1.0mm Metric - 1 - - - HSS - - -
RS Stock No. 455-895
BrandRS PRO
SGD18.33
Each
units
Threading Tap M4 Spiral Point 0.7mm Metric - 1 53 mm - - HSS 4 mm - -
RS Stock No. 215-524
BrandRS PRO
SGD54.97
Each
units
Hand Tap M12 Hand Tap - - - 3 - - - HSS - - -
RS Stock No. 152-491
BrandRS PRO
SGD21.33
1 Set
Set(s)
Straight Flute Tap M2 Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 828-145
BrandRS PRO
SGD11.34
Each
units
Threading Tap M4 Hexagon Drive Tap - Metric - 1 - - - HSS - - -
RS Stock No. 152-457
BrandRS PRO
SGD15.16
1 Set
Set(s)
Straight Flute Tap #8 BA Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 455-908
BrandRS PRO
SGD16.47
Each
units
Threading Tap M2.5 Spiral Point 0.45mm Metric - 1 44.5 mm - - HSS 2.8 mm - -
RS Stock No. 152-514
BrandRS PRO
SGD38.71
Each
units
Threading Tap M20 Straight Flute, Plug 2.5mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 455-902
BrandRS PRO
SGD16.66
Each
units
Threading Tap M3 Spiral Point 0.5mm Metric - 1 48 mm - - HSS 3.15 mm - -
RS Stock No. 668-1087
BrandRS PRO
SGD52.26
1 Set
Set(s)
Threading Tap M8 Straight Flute 1.25mm Metric Left Hand 1 72 mm - - HSS 6.3 mm - -
RS Stock No. 340-6552
BrandRS PRO
SGD112.47
1 Set
Set(s)
Spiral Point Tap M12 Spiral Point Tap - - - 7 - - - HSS - - -
RS Stock No. 340-6568
BrandRS PRO
SGD127.43
1 Set
Set(s)
Spiral Flute Tap M12 Spiral Flute Tap - - - 7 - - - HSS - - -
RS Stock No. 152-570
BrandRS PRO
SGD13.99
Each
units
Threading Tap M2.5 Straight Flute, Taper 0.45mm Metric - 1 - - Hand Tap HSS - - -