Threading Taps

Threading taps are used to create threads for bolts in materials like metals and plastics. Most commonly used in engineering and manufacturing, threading taps work similar to 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.

Types of Threading Taps

Most commonly classified by three types, taps can be used in different ways for different applications.
•Taper taps, sometimes called 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 unlike a taper tap, plug taps 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. Bottom taps full length cutting shape allow for threads to be cut at the very bottom of a hole for maximum thread length.



Taps come in a range of sizes in both Metric and Imperial dimension and can also 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 Thread Size Type Pitch Thread Standard Thread Direction Overall Length Material Shank Diameter Shank Type Ring Colour For Use With Class of Fit
RS Stock No. 455-970
BrandRS PRO
$10.04
Each
units
#4-40 Spiral Point - UNC - 48 mm HSS 3.15 mm Plain - - -
RS Stock No. 668-1078
BrandRS PRO
$32.36
1 Set
Set(s)
M6 Straight Flute 1mm Metric Left Hand 66 mm HSS 6.3 mm Plain - - -
RS Stock No. 455-974
BrandRS PRO
$9.72
Each
units
#6-32 Spiral Point - UNC - 50 mm HSS 3.55 mm Plain - - -
RS Stock No. 152-120
BrandRS PRO
$9.21
Each
units
M2 Straight Flute, Plug 0.4mm Metric Coarse - - HSS - Plain - - -
RS Stock No. 522-7632
BrandRS PRO
$94.20
Each
units
M18 Second, Straight Flute 1mm Metric Fine - 97 mm HSS 13.8 mm Plain - - 6H
RS Stock No. 152-384
BrandRS PRO
$4.62
Each
units
M5 Straight Flute, Plug 0.8mm Metric Coarse - - HSS - Plain - - -
RS Stock No. 668-1093
BrandRS PRO
$9.77
1 Set
Set(s)
1/4-28 Straight Flute - UNF - 56 mm HSS 6 mm Plain - - -
RS Stock No. 669-9381
BrandRS PRO
$10.49
Each
units
M4 Hexagon Drive Tap 0.7mm Metric - 35 mm HSS - Hex - - -
RS Stock No. 152-164
BrandRS PRO
$10.62
Each
units
M2 Straight Flute, Second 0.4mm Metric Coarse - - HSS - Plain - - -
RS Stock No. 522-7676
BrandRS PRO
$232.89
Each
units
M30 Second, Straight Flute 1.5mm Metric Fine - 130 mm HSS 19.9 mm Plain - - 6H
RS Stock No. 669-9372
BrandRS PRO
$10.49
Each
units
M3 Hexagon Drive Tap 0.5mm Metric - 32.5 mm HSS - Hex - - -
RS Stock No. 668-1071
BrandRS PRO
$14.71
1 Set
Set(s)
M4 Straight Flute 0.7mm Metric Left Hand 53 mm HSS 4 mm Plain - - -
RS Stock No. 455-980
BrandRS PRO
$5.53
Each
units
#2-56 Spiral Point - UNC - 44.5 mm HSS 2.8 mm Plain - - -
RS Stock No. 522-7575
BrandRS PRO
$36.42
Each
units
M10 Second, Straight Flute 1mm Metric Fine - 76 mm HSS 9.95 mm Plain - - 6H
RS Stock No. 152-299
BrandRS PRO
$4.21
Each
units
M4 Straight Flute, Plug 0.7mm Metric Coarse - - HSS - Plain - - -
RS Stock No. 427-941
BrandRS PRO
$65.04
Each
units
PG13.5-18 Straight Flute - PG - 80 mm HSS 16 mm Plain - - -
RS Stock No. 152-300
BrandRS PRO
$9.83
Each
units
M5 Straight Flute, Taper 0.8mm Metric Coarse - - HSS - Plain - - -
RS Stock No. 151-937
BrandRS PRO
$10.90
Each
units
M2 Spiral Flute, Second 0.4mm Metric Coarse - - HSS - Plain - - -
RS Stock No. 668-1100
BrandRS PRO
$17.15
1 Set
Set(s)
1/4-20 Straight Flute - UNC - 56 mm HSS 6 mm Plain - - -
RS Stock No. 522-7654
BrandRS PRO
$86.81
Each
units
M20 Second, Straight Flute 1.5mm Metric Fine - 112 mm HSS 13.95 mm Plain - - 6H
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