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. 241-4079
Mfr. Part No.E500 5.0 X 0.80 3FL SET3
BrandDormer
SGD57.75
1 Set
Set(s)
Straight Flute Tap M5 Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 269-5290
Mfr. Part No.E100 2,5N8
BrandDormer
SGD68.57
Each
units
Threading Tap Set M2.5 Straight Flute 0.45mm Metric Right Hand 3 40 mm - Hand Tap HSS 2.8 mm - -
RS Stock No. 705-9440
Mfr. Part No.EX01 M4
BrandDormer
SGD38.16
Each
units
Threading Tap M4 Spiral flute 0.7mm Metric Right Hand 1 63 mm - Machine Tap HSS-E 4.5 mm - -
RS Stock No. 269-5341
Mfr. Part No.E100 3N8
BrandDormer
SGD53.44
Each
units
Threading Tap Set M3 Straight Flute 0.5mm Metric Right Hand 3 40 mm - Hand Tap HSS 3.5 mm - -
RS Stock No. 705-9453
Mfr. Part No.EX01 M6
BrandDormer
SGD40.74
Each
units
Threading Tap M6 Spiral flute 1.0mm Metric Right Hand 1 80 mm - Machine Tap HSS-E 6 mm - -
RS Stock No. 241-4085
Mfr. Part No.E500 6.0 X 1.00 3FL SET3
BrandDormer
SGD56.85
1 Set
Set(s)
Straight Flute Tap M6 Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 178-939
Mfr. Part No.7915 UNC
BrandDormer
SGD473.45
1 Set
Set(s)
Threading Tap Set - - - - - 22 - - - HSS - - -
RS Stock No. 705-9450
Mfr. Part No.EX01 M10
BrandDormer
SGD56.42
Each
units
Threading Tap M10 Spiral flute 1.5mm Metric Right Hand 1 100 mm - Machine Tap HSS-E 10 mm - -
RS Stock No. 241-4120
Mfr. Part No.E500 12.0 X 1.75 3FL SET3
BrandDormer
SGD102.12
1 Set
Set(s)
Straight Flute Tap M12 Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 469-3347
Mfr. Part No.7910 E500
BrandDormer
SGD125.22
1 Set
Set(s)
Straight Flute Tap M10 Straight Flute Tap - - - 6 - - - HSS - - -
RS Stock No. 178-923
Mfr. Part No.7915 UNF
BrandDormer
SGD514.49
1 Set
Set(s)
Threading Tap Set - - - - - 22 - - - HSS - - -
RS Stock No. 241-4063
Mfr. Part No.E500 4.0 X 0.70 3FL SET3
BrandDormer
SGD51.64
1 Set
Set(s)
Straight Flute Tap M4 Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 241-4029
Mfr. Part No.E500 2.5 X 0.45 3FL SET3
BrandDormer
SGD80.07
1 Set
Set(s)
Straight Flute Tap M2.5 Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 241-4300
Mfr. Part No.E515 5/16 X 18 SET
BrandDormer
SGD65.52
1 Set
Set(s)
Straight Flute Tap 5/16 in UNC Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 299-8820
Mfr. Part No.E105-M14/1,00
BrandDormer
SGD102.83
Each
units
Threading Tap Set M14 Straight Flute 1.0mm Metric Right Hand 2 70 mm - Hand Tap HSS 11 mm - -
RS Stock No. 528-3884
Mfr. Part No.E003M10
BrandDormer
SGD66.34
Each
units
Threading Tap M10 Spiral Flute 1.5mm Metric Right Hand 1 80 mm - Machine Tap HSS-XS1 10 mm - -
RS Stock No. 241-4041
Mfr. Part No.E500 3.0 X 0.50 3FL SET3
BrandDormer
SGD58.61
1 Set
Set(s)
Straight Flute Tap M3 Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 241-4108
Mfr. Part No.E500 8.0 X 1.25 3FL SET3
BrandDormer
SGD65.81
1 Set
Set(s)
Straight Flute Tap M8 Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 241-4293
Mfr. Part No.E515 1/4 X 20 SET
BrandDormer
SGD56.97
1 Set
Set(s)
Straight Flute Tap 1/4 in UNC Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 528-3834
Mfr. Part No.E003M4
BrandDormer
SGD45.17
Each
units
Threading Tap M4 Spiral Flute 0.7mm Metric Right Hand 1 53 mm - Machine Tap HSS-XS1 4 mm - -