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. 455-891
BrandRS PRO
MYR51.00
Each
units
Threading Tap M3.5 Spiral Point 0.6mm Metric - 1 50 mm - - HSS 3.55 mm - -
RS Stock No. 917-2599
BrandRS PRO
MYR374.49
1 Set
Set(s)
Threading Tap Set - Hand tap and drill set - - - 29 - - - High Speed Steel - - -
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. 522-7676
BrandRS PRO
MYR656.36
Each
units
Threading Tap M30 Second, Straight Flute 1.5mm Metric Fine - 1 130 mm - - HSS 19.9 mm - -
RS Stock No. 522-7575
BrandRS PRO
MYR108.33
Each
units
Threading Tap M10 Second, Straight Flute 1.0mm Metric Fine - 1 76 mm - - HSS 9.95 mm - -
RS Stock No. 152-158
BrandRS PRO
MYR69.73
1 Set
Set(s)
Straight Flute Tap #2 BA Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 522-7660
BrandRS PRO
MYR210.77
Each
units
Threading Tap M25 Second, Straight Flute 1.5mm Metric Fine - 1 130 mm - - HSS 17.9 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. 152-457
BrandRS PRO
MYR29.27
1 Set
Set(s)
Straight Flute Tap #8 BA Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 455-964
BrandRS PRO
MYR73.90
Each
units
Threading Tap 3/8-16 Spiral Point - UNC - 1 80 mm - - 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. 828-139
BrandRS PRO
MYR37.19
Each
units
Threading Tap M3 Hexagon Drive Tap - Metric - 1 - - - HSS - - -
RS Stock No. 668-1100
BrandRS PRO
MYR78.23
1 Set
Set(s)
Threading Tap 1/4-20 Straight Flute - UNC - 1 56 mm - Hand Tap HSS 6 mm - -
RS Stock No. 152-025
BrandRS PRO
MYR63.73
Each
units
Threading Tap M5 Spiral Flute, Second 0.8mm Metric - 1 - - - HSS - - -
RS Stock No. 917-2618
BrandRS PRO
MYR308.70
Each
units
Threading Tap PG36 - - - - 1 140 mm - Hand Tap HSS 36.0 mm - -
RS Stock No. 151-824
BrandRS PRO
MYR128.95
1 Set
Set(s)
Straight Flute Tap M10 Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 152-429
BrandRS PRO
MYR59.29
1 Set
Set(s)
Straight Flute Tap 5/16 in UNC Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 151-965
BrandRS PRO
MYR75.12
1 Set
Set(s)
Straight Flute Tap 1/4 in BSF Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 152-372
BrandRS PRO
MYR126.18
1 Set
Set(s)
Straight Flute Tap M20 Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 152-069
BrandRS PRO
MYR38.47
Each
units
Threading Tap M3 Straight Flute, Plug 0.5mm Metric - 1 - - Hand Tap HSS - - -
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