Storage racks and machine area
Keep DIN 371 spiral flute explicit in the packing brief. The M6 working length differs from both the general spiral flute and DIN 371 point tool, so the nominal size alone is an incomplete stock identifier.
THREADING TOOLS / INDUSTRIAL PROCUREMENT
DIN 371 HSS Spiral Flute Machine Tap
Choose a DIN 371 blind-hole tool using both flute form and reinforced-shank dimensions.
The fully ground DIN 371 spiral flute machine tap series covers 12 listed nominal metric sizes from M2 to M10. Its helical flutes address return-chip selection for blind holes, while the DIN 371 dimensional family separates it from general metric and reduced-shank DIN 376 alternatives.
12 defined entriesSize-by-size dimensions for an identifiable purchasing list.
HSS / HSS-CoTie the tool-material requirement to the selected application.
Order-line controlKeep the approved geometry and quantities together for replenishment.
- Fully ground DIN 371 spiral flute design.
- Spiral flute geometry for blind hole chip evacuation.
- HSS and HSS-Co material options.
- Listed sizes: M2–M10.
PRODUCT SELECTION
Sizes, Dimensions & Drive Interface
Dimensions are in millimetres except thread designations, drive labels and lead counts. Read each column with the dimension reference below.
| Thread / designation | Overall length L (mm) | Working / cutting length Lc (mm) | Listed diameter d (mm) | Square / drive k (mm) | Pilot reference (mm) |
|---|---|---|---|---|---|
| M2 | 45 | 6 | 2.8 | 2.1 | 1.6 |
| M2.5 | 50 | 7.5 | 2.8 | 2.1 | 2.05 |
| M3 | 56 | 5 | 3.5 | 2.7 | 2.5 |
| M3.5 | 56 | 6 | 4 | 3 | 2.9 |
| M4 | 63 | 7 | 4.5 | 3.4 | 3.3 |
| M4.5 | 70 | 8 | 6 | 4.9 | 3.7 |
| M5 | 70 | 8 | 6 | 4.9 | 4.2 |
| M6 | 80 | 10 | 6 | 4.9 | 5 |
| M7 | 80 | 10 | 7 | 5.5 | 6 |
| M8 | 90 | 13 | 8 | 6.2 | 6.8 |
| M9 | 90 | 13 | 9 | 7 | 7.8 |
| M10 | 100 | 15 | 10 | 8 | 8.5 |
Match pilot-hole preparation to the thread system, workpiece and agreed acceptance requirement.
M6 is listed at L 80 mm, Lc 10 mm, d 6 mm and k 4.9 mm. That differs from the general M6 spiral flute item at L 66 mm and Lc 15 mm, even before the drive dimensions are compared.
Send the sizes and dimensions your customer needs.Request a Quote →
PRODUCT SELECTION
Application, Chip Path & Selection Limits
Match the component and operation
For blind-hole work, provide drilled depth, required full-thread depth and workpiece grade. Review the spiral chip path together with the lead and bottom allowance, then match the holder to the DIN 371 dimensions.
Check the operating boundary
Do not import a helix angle, coating or material-specific speed from another manufacturer’s DIN tap. The dimensional designation does not define all those details. Pitch must also be stated explicitly.
PRODUCT SELECTION
Compare the Adjacent Product Families
| Product family | Selection boundary to review |
|---|---|
| DIN 376 HSS Spiral Flute Machine Tap | Keep the reduced-shank blind-hole tap separate from DIN 371 stock with the same thread label. |
| HSS Metric Spiral Flute Machine Tap | General metric return-chip spiral flute series for blind-hole selection; retain the published dimensions. |
| DIN 371 HSS Spiral Point Machine Tap | For DIN 371 through-hole work, specify the point form as carefully as the shank size. |
Keep the selected family, thread designation and dimensional reference together. Shared nominal sizes or drive shapes do not establish interchangeability.
WORKSHOP & SUPPLIER REVIEW
Workshop, Material Handling & Order Organisation
DIN 371 blind-hole selection combines return-chip geometry with a different dimensional family from the general metric tool. Review the cutting length and holder dimensions against the approved sample before arranging replenishment.
Bar-stock handling
Carry the HSS / HSS-Co requirement with the item drawing when discussing material preparation for this range.
Component feed and transfer
Keep the approved item identity and dimensional revision with components during order discussions. Use the exact thread and drive dimensions to distinguish similar tools.
Plan the order around the approved item
- Define the thread and application using this product’s selection table.
- Compare the tool interface and cutting geometry with the sample or drawing.
- Agree sample acceptance, quantities by size and the requested pack arrangement.
- Reference the same approved item and revision for replenishment.
QUALITY & SAMPLE ACCEPTANCE
Quality Review for the Selected Specification
Review the flute form, cutting-section length and drive interface on the same reference sample. Thread size alone cannot distinguish the general and DIN 371 blind-hole tools.
Use the following items to define the sample and order acceptance brief.
| Review item | What to agree | Procurement risk addressed |
|---|---|---|
| Thread identification | Nominal size, required pitch and finished-thread requirement | Avoid the wrong thread family or pitch |
| Dimensions and holding | M6 is listed at L 80 mm, Lc 10 mm, d 6 mm and k 4.9 mm. That differs from the general M6 spiral flute item at L 66 mm and Lc 15 mm, even before the drive dimensions are compared. | Avoid holder mismatch, insufficient reach or unintended substitution |
| Geometry / set identity | Review the flute form, cutting-section length and drive interface on the same reference sample. Thread size alone cannot distinguish the general and DIN 371 blind-hole tools. | Avoid the wrong cutting form or incomplete member sequence |
| Sample acceptance plan | Agree the reference drawing, acceptance method and sampling requirement for the application | Make sample approval and repeat-order review refer to the same item |
PROCUREMENT & REPLENISHMENT
Packaging, Custom Requests & Bulk Purchasing
Keep the packing brief specific
Keep DIN 371, spiral flute and the requested thread pitch together in wholesale stock descriptions. In a replacement order, carry the 10 mm M6 cutting-section value rather than inheriting the general-series value.
Marking, packs & repeat orders
Keep DIN 371 spiral flute explicit in the packing brief. The M6 working length differs from both the general spiral flute and DIN 371 point tool, so the nominal size alone is an incomplete stock identifier.
Turn the selection into a clear purchasing list
Choose a DIN 371 blind-hole tool using both flute form and reinforced-shank dimensions.
SELECTION & BUYER QUESTIONS
Product Questions
Why use a spiral flute tool for a DIN 371 blind-hole enquiry?
The flutes help draw chips towards the entrance. The specific lead, workpiece and drilled depth must still allow the required full thread.
Is the DIN 371 M6 spiral flute tap the same length as the general M6?
No. This row lists L 80 mm and Lc 10 mm; the general metric spiral flute row lists L 66 mm and Lc 15 mm.
What is the DIN 371 M6 drive interface?
A 6 mm round shank and 4.9 mm square are listed. Verify clamping length and holder engagement as well as these dimensions.
Does DIN 371 specify a 35° helix?
No such universal angle follows from the dimensional family. State any required geometry and workpiece conditions for review.
Can DIN 376 spiral flute be used in the same holder?
Not without a dimensional check. Its M6 row has a 4.5 mm shank and 3.4 mm square, compared with 6 mm and 4.9 mm here.
What should a DIN 371 blind-hole RFQ identify?
Size/pitch, drilled and full-thread depths, workpiece, material requirement, holder and quantities. Attach the required dimensional drawing or approved sample reference.
PRODUCT ENQUIRY
Request a Quote for DIN 371 HSS Spiral Flute Machine Tap
Send the selected thread designation, quantities and the application details below. Add a drawing or size list to keep the enquiry tied to the required configuration.