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. 668-1080
BrandRS PRO
MYR155.42
1 Set
Set(s)
Threading Tap M10 Straight Flute 1.5mm Metric Left Hand 1 80 mm - - HSS 8 mm - -
RS Stock No. 152-097
BrandRS PRO
MYR45.70
Each
units
Threading Tap M10 Straight Flute, Second 1.5mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 151-836
BrandRS PRO
MYR89.22
1 Set
Set(s)
Straight Flute Tap M8 Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 152-160
BrandRS PRO
MYR156.42
1 Set
Set(s)
Straight Flute Tap 3/8 in BSP Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 152-091
BrandRS PRO
MYR35.22
Each
units
Threading Tap M3.5 Straight Flute, Plug 0.6mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 522-7648
BrandRS PRO
MYR222.48
Each
units
Threading Tap M18 Second, Straight Flute 1.5mm Metric Fine - 1 111 mm - - HSS 13.8 mm - -
RS Stock No. 152-047
BrandRS PRO
MYR30.80
Each
units
Threading Tap M3.5 Straight Flute, Second 0.6mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 455-968
BrandRS PRO
MYR42.32
Each
units
Threading Tap 1/4-20 Spiral Point - UNC - 1 66 mm - - HSS 6.3 mm - -
RS Stock No. 669-9381
BrandRS PRO
MYR36.72
Each
units
Threading Tap M4 Hexagon Drive Tap 0.7mm Metric - 1 35 mm - - HSS - - -
RS Stock No. 522-7604
BrandRS PRO
MYR155.07
Each
units
Threading Tap M12 Second, Straight Flute 1.5mm Metric Fine - 1 88 mm - - HSS 8.9 mm - -
RS Stock No. 522-7553
BrandRS PRO
MYR70.30
Each
units
Threading Tap M8 Second, Straight Flute 0.75mm Metric Fine - 1 66 mm - - HSS 6.3 mm - -
RS Stock No. 152-255
BrandRS PRO
MYR153.82
Each
units
Threading Tap M20 Straight Flute, Taper 2.5mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 152-306
BrandRS PRO
MYR32.99
Each
units
Threading Tap M4 Straight Flute, Second 0.7mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 152-075
BrandRS PRO
MYR32.70
Each
units
Threading Tap M3 Straight Flute, Second 0.5mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 152-053
BrandRS PRO
MYR41.43
Each
units
Threading Tap M3.5 Straight Flute, Taper 0.6mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 152-227
BrandRS PRO
MYR51.54
Each
units
Threading Tap M12 Straight Flute, Second 1.75mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 669-9397
BrandRS PRO
MYR46.78
Each
units
Threading Tap M8 Hexagon Drive Tap 1.25mm Metric - 1 40.4 mm - - HSS - - -
RS Stock No. 749-5691
BrandRS PRO
MYR39.46
1 Set
Set(s)
Threading Tap Set - - - - - 2 - - - HSS - - -
RS Stock No. 151-921
BrandRS PRO
MYR52.68
1 Set
Set(s)
Straight Flute Tap M2.5 Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 152-542
BrandRS PRO
MYR40.03
Each
units
Threading Tap M6 Straight Flute, Plug 1.0mm Metric - 1 - - Hand Tap HSS - - -