Dies

A high-quality, reliable threading tool is essential for workshops and industrial businesses that require threads measured to an exact metric thread size, which will give the pitch of the thread in millimetres (mm). At RS Components, we have thread dies made from both standard steel and high-speed steel (HSS) available, meaning there is a choice of material to best suit your requirements. Our available products cover a range of metric sizes and pitches.


What is a thread die and what are they used for?


Thread dies are special tools used in the manufacturing industry to create the threads on screws, bolts, nuts and other male fixing items. Over time, threads can become damaged and may need rethreading, which dies can also be used for. There are cavities to remove chips and debris as the thread is cut, however, it is recommended to use a chaser for cleaning debris from threads as dies will remove additional material each time they are used on a male thread. This will cause the locking of male and female portions to weaken.


In order to ensure proper alignment during threading, die stocks are often used to hold the die in place and ensure the threading is uniform. The diameter of a die stock can be adjusted slightly to allow for different sized round and hex dies and are tightened to fit the chosen die.


What types of thread die are there?


The external shape of the thread die can be round, square, hexagon or tubular and can be further classified as solid, split or separable. Round dies are the most common and, depending on their size, have three or more serrated cutting edges and geometrically represent the nut thread. There are also left-hand thread dies for applications in which a right-hand thread would cause the male portion to loosen, such as the left-hand pedal on a bicycle.


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Description Price Thread Size Pitch Outside Diameter Thickness Material Left Hand Thread
RS Stock No. 264-0032
BrandRS PRO
HK$183.05
Each
units
M16 1.5mm 42mm - - -
RS Stock No. 215-805
BrandRS PRO
HK$112.20
Each
units
M6 0.75mm 13/16in - HSS -
RS Stock No. 215-811
BrandRS PRO
HK$116.61
Each
units
M8 1mm 1in - HSS -
RS Stock No. 215-619
BrandRS PRO
HK$135.45
Each
units
M10 1.5mm 1in - - -
RS Stock No. 508-9547
Mfr. Part No.04412
BrandEXACT
HK$129.45
Each
units
5/16-24 - 25mm 9mm HSS -
RS Stock No. 509-0086
Mfr. Part No.70414
BrandEVENTUS
HK$57.47
Each
units
M6 1mm 25mm 9mm HSS -
RS Stock No. 668-0740
BrandRS PRO
HK$131.66
Each
units
3/8-24 UNF - 25.4mm 9mm HSS -
RS Stock No. 508-9402
Mfr. Part No.70411
BrandEVENTUS
HK$57.47
Each
units
M3 0.5mm 25mm 9mm HSS -
RS Stock No. 668-0722
BrandRS PRO
HK$149.89
Each
units
M6 1mm 25mm 9mm HSS -
RS Stock No. 508-9525
Mfr. Part No.04414
BrandEXACT
HK$161.04
Each
units
7/16-20 - 30mm 11mm HSS -
RS Stock No. 509-0121
Mfr. Part No.04314
BrandEXACT
HK$184.89
Each
units
1/2-13 - 38mm 14mm HSS -
RS Stock No. 205-2306
BrandRS PRO
HK$718.86
Each
units
1/4 in BSPT - - - Steel -
RS Stock No. 509-0171
Mfr. Part No.04413
BrandEXACT
HK$144.49
Each
units
3/8-24 - 30mm 11mm HSS -
RS Stock No. 509-0115
Mfr. Part No.04311
BrandEXACT
HK$129.45
Each
units
5/16-18 - 25mm 9mm HSS -
RS Stock No. 509-0165
Mfr. Part No.04310
BrandEXACT
HK$116.78
Each
units
1/4-20 - 20mm 7mm HSS -
RS Stock No. 215-653
BrandRS PRO
HK$86.73
Each
units
M2 0.4mm 13/16in - - -
RS Stock No. 215-625
BrandRS PRO
HK$124.07
Each
units
M12 1.75mm 1-5/16in - - -
RS Stock No. 668-0728
BrandRS PRO
HK$148.42
Each
units
M5 0.8mm 25mm 9mm HSS -
RS Stock No. 215-631
BrandRS PRO
HK$128.23
Each
units
M7 1mm 13/16in - - -
RS Stock No. 386-947
Mfr. Part No.70412
BrandEVENTUS
HK$57.47
Each
units
M4 0.7mm 25mm 9mm HSS -