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. 205-2306
BrandRS PRO
PHP4,088.51
Each
units
1/4 in BSPT - - - Steel -
RS Stock No. 215-805
BrandRS PRO
PHP713.60
Each
units
M6 0.75mm 13/16in - HSS -
RS Stock No. 668-0769
BrandRS PRO
PHP1,516.76
Each
units
M8 1.25mm 33.33mm 11.11mm HSS Yes
RS Stock No. 508-9531
Mfr. Part No.04415
BrandEXACT
PHP1,041.04
Each
units
1/2-20 UNF - 38mm 10mm HSS -
RS Stock No. 215-647
BrandRS PRO
PHP812.33
Each
units
M5 0.8mm 13/16in - - -
RS Stock No. 215-748
BrandRS PRO
PHP1,446.26
Each
units
M12 1.25mm 1.31in - HSS -
RS Stock No. 668-0753
BrandRS PRO
PHP843.57
Each
units
M4 0.7mm 20.63mm 6.35mm HSS Yes
RS Stock No. 509-0121
Mfr. Part No.04314
BrandEXACT
PHP1,189.28
Each
units
1/2-13 - 38mm 14mm HSS -
RS Stock No. 264-0054
BrandRS PRO
PHP995.83
Each
units
25 mm - 42mm - - -
RS Stock No. 668-0716
BrandRS PRO
PHP687.97
Each
units
M3 0.5mm 25mm 9mm HSS -
RS Stock No. 386-947
Mfr. Part No.70412
BrandEVENTUS
PHP376.13
Each
units
M4 0.7mm 25mm 9mm HSS -
RS Stock No. 215-726
BrandRS PRO
PHP691.19
Each
units
M10 1.25mm 1in - HSS -
RS Stock No. 508-9402
Mfr. Part No.70411
BrandEVENTUS
PHP362.11
Each
units
M3 0.5mm 25mm 9mm HSS -
RS Stock No. 215-619
BrandRS PRO
PHP711.76
Each
units
M10 1.5mm 1in - - -
RS Stock No. 509-0171
Mfr. Part No.04413
BrandEXACT
PHP819.31
Each
units
3/8-24 - 30mm 11mm HSS -
RS Stock No. 509-0193
Mfr. Part No.04411
BrandEXACT
PHP662.15
Each
units
1/4-28 - 20mm 7mm HSS -
RS Stock No. 508-9547
Mfr. Part No.04412
BrandEXACT
PHP734.02
Each
units
5/16-24 - 25mm 9mm HSS -
RS Stock No. 215-776
BrandRS PRO
PHP660.29
Each
units
M3 0.35mm 13/16in - HSS -
RS Stock No. 668-0750
BrandRS PRO
PHP854.88
Each
units
M6 1mm 20.63mm 6.35mm HSS Yes
RS Stock No. 509-0092
Mfr. Part No.70413
BrandEVENTUS
PHP369.71
Each
units
M5 0.8mm 25mm 9mm HSS -