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. 373-796
Mfr. Part No.E650 M4
BrandDormer
HK$349.62
Each
units
Threading Tap M4 Combination 0.7mm Metric Right Hand 1 65 mm - - HSS 4 mm - -
RS Stock No. 389-2032
Mfr. Part No.45126
BrandRecoil
HK$418.82
Each
units
Threading Tap M12 Bottoming 1.75mm Metric - 1 - - - - - - -
RS Stock No. 240-3316
Mfr. Part No.E500 8.0 X 1.25 3FL BOTT
BrandDormer
HK$138.81
Each
units
Threading Tap M8 Plug, Straight Flute 1.25mm Metric Right Hand 1 72 mm - Machine Tap HSS 8 mm - -
RS Stock No. 152-356
BrandRS PRO
HK$102.59
1 Set
Set(s)
Straight Flute Tap #6 UNC Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 389-1966
Mfr. Part No.45036
BrandRecoil
HK$192.99
Each
units
Threading Tap M3 Bottoming 0.5mm Metric - 1 - - - - - - -
RS Stock No. 705-9434
Mfr. Part No.EX01 M2
BrandDormer
HK$269.18
Each
units
Threading Tap M2 Spiral flute 0.4mm Metric Right Hand 1 45 mm - Machine Tap HSS-E 2.8 mm - -
RS Stock No. 241-4338
Mfr. Part No.E515 1/2 X 13 SET
BrandDormer
HK$520.86
1 Set
Set(s)
Straight Flute Tap 1/2 in UNC Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 299-9514
Mfr. Part No.E237-M3
BrandDormer
HK$185.44
Each
units
Threading Tap M3 Straight Flute 0.5mm Metric Left Hand 1 56 mm - Machine Tap HSS-E 3.5 mm - -
RS Stock No. 240-3041
Mfr. Part No.E500 2.0 X 0.40 3FL BOTT
BrandDormer
HK$172.74
Each
units
Threading Tap M2 Plug, Straight Flute 0.4mm Metric Right Hand 1 41 mm - Machine Tap HSS 2.5 mm - -
RS Stock No. 241-4300
Mfr. Part No.E515 5/16 X 18 SET
BrandDormer
HK$328.56
1 Set
Set(s)
Straight Flute Tap 5/16 in UNC Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 787-8989
Mfr. Part No.L113202
BrandDormer
HK$1,492.82
Each
units
Threading Tap Set - - - - - 14 - - - HSS-E, HSS-TiN - - -
RS Stock No. 508-9654
Mfr. Part No.05905
BrandEXACT
HK$135.34
Each
units
Threading Tap M8 Combination 1.25mm Metric Right Hand 1 50 mm - - HSS 1/4 in - -
RS Stock No. 528-3878
Mfr. Part No.E003M8
BrandDormer
HK$249.62
Each
units
Threading Tap M8 Spiral Flute 1.25mm Metric Right Hand 1 72 mm - Machine Tap HSS-XS1 8 mm - -
RS Stock No. 241-5123
Mfr. Part No.E524 5/16 X 24 SET
BrandDormer
HK$422.48
1 Set
Set(s)
Straight Flute Tap 5/16 in UNF Straight Flute Tap - - - 3 - - - HSS - - -
RS Stock No. 705-9440
Mfr. Part No.EX01 M4
BrandDormer
HK$201.12
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. 509-0294
Mfr. Part No.05904
BrandEXACT
HK$116.38
Each
units
Threading Tap M6 Combination 1.0mm Metric Right Hand 1 44 mm - - HSS 1/4 in - -
RS Stock No. 152-520
BrandRS PRO
HK$86.89
1 Set
Set(s)
Straight Flute Tap M3 Straight Flute Tap - - - 2 - - - HSS - - -
RS Stock No. 240-3108
Mfr. Part No.E500 3.0 X 0.50 3FL SEC
BrandDormer
HK$111.54
Each
units
Threading Tap M3 Second, Straight Flute 0.5mm Metric Right Hand 1 48 mm - Machine Tap HSS 3.15 mm - -
RS Stock No. 787-8982
Mfr. Part No.L113204
BrandDormer
HK$1,823.89
Each
units
Threading Tap Set - - - - - 14 - - - HSS-E, HSS-TiN - - -
RS Stock No. 269-5420
Mfr. Part No.E100 4N8
BrandDormer
HK$308.26
Each
units
Threading Tap Set M4 Straight Flute 0.7mm Metric Right Hand 3 45 mm - Hand Tap HSS 4.5 mm - -