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. 668-1096
BrandRS PRO
MYR98.16
1 Set
Set(s)
Threading Tap 3/8-24 Straight Flute - UNF - 1 63 mm - Hand Tap HSS 7 mm - -
RS Stock No. 152-136
BrandRS PRO
MYR87.18
1 Set
Set(s)
Straight Flute Tap 1/4 in BSW Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 151-864
BrandRS PRO
MYR59.84
1 Set
Set(s)
Straight Flute Tap M12 Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 427-941
BrandRS PRO
MYR252.30
Each
units
Threading Tap PG13.5-18 Straight Flute - PG - 1 80 mm - Hand Tap HSS 16 mm - -
RS Stock No. 152-110
BrandRS PRO
MYR43.86
Each
units
Threading Tap M7 Straight Flute, Plug 1.0mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 668-1084
BrandRS PRO
MYR213.16
1 Set
Set(s)
Threading Tap M12 Straight Flute 1.75mm Metric Left Hand 1 89 mm - - HSS 9 mm - -
RS Stock No. 917-2606
BrandRS PRO
MYR131.40
Each
units
Threading Tap PG21 - - - - 1 90 mm - Hand Tap HSS 22.0 mm - -
RS Stock No. 152-104
BrandRS PRO
MYR48.98
Each
units
Threading Tap M8 Straight Flute, Second 1.25mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 152-439
BrandRS PRO
MYR62.72
1 Set
Set(s)
Straight Flute Tap 1/4 in UNC Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 152-132
BrandRS PRO
MYR117.69
1 Set
Set(s)
Straight Flute Tap 3/8 in BSW Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 455-918
BrandRS PRO
MYR79.56
Each
units
Threading Tap M10 Spiral Point 1.5mm Metric - 1 80 mm - Machine Tap HSS 10 mm - -
RS Stock No. 668-1103
BrandRS PRO
MYR113.07
1 Set
Set(s)
Threading Tap 3/8-16 Straight Flute - UNC - 1 70 mm - Hand Tap HSS 7 mm - -
RS Stock No. 669-9372
BrandRS PRO
MYR36.99
Each
units
Threading Tap M3 Hexagon Drive Tap 0.5mm Metric - 1 32.5 mm - - HSS - - -
RS Stock No. 455-924
BrandRS PRO
MYR50.66
Each
units
Threading Tap #10-24 Spiral Point - UNC - 1 58 mm - Machine Tap HSS 5 mm - -
RS Stock No. 152-198
BrandRS PRO
MYR69.26
Each
units
Threading Tap M16 Straight Flute, Second 2.0mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 522-7632
BrandRS PRO
MYR209.12
Each
units
Threading Tap M18 Second, Straight Flute 1.0mm Metric Fine - 1 97 mm - - HSS 13.8 mm - -
RS Stock No. 152-108
BrandRS PRO
MYR56.05
Each
units
Threading Tap M8 Straight Flute, Taper 1.25mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 668-1062
BrandRS PRO
MYR97.72
1 Set
Set(s)
Threading Tap M3 Straight Flute 0.5mm Metric Left Hand 1 48 mm - - HSS 3.15 mm - -
RS Stock No. 152-255
BrandRS PRO
MYR180.96
Each
units
Threading Tap M20 Straight Flute, Taper 2.5mm Metric - 1 - - Hand Tap HSS - - -
RS Stock No. 152-047
BrandRS PRO
MYR36.24
Each
units
Threading Tap M3.5 Straight Flute, Second 0.6mm Metric - 1 - - Hand Tap HSS - - -
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