Storage racks and machine area
Use DIN 371 spiral point in the pack description and attach the complete thread specification. Avoid a generic DIN 371 tap label where blind-hole spiral flute stock is also ordered.
For DIN 371 through-hole work, specify the point form as carefully as the shank size.
This fully ground DIN 371 spiral point machine tap family covers 12 nominal metric sizes from M2 to M10. It directs chips forwards and has a distinct DIN 371 drive-dimension table. It is not the spiral flute blind-hole version of the same nominal thread.
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 | 8 | 2.8 | 2.1 | 1.6 |
| M2.5 | 50 | 9 | 2.8 | 2.1 | 2.05 |
| M3 | 56 | 9 | 3.5 | 2.7 | 2.5 |
| M3.5 | 56 | 11 | 4 | 3 | 2.9 |
| M4 | 63 | 12 | 4.5 | 3.4 | 3.3 |
| M4.5 | 70 | 13 | 6 | 4.9 | 3.7 |
| M5 | 70 | 13 | 6 | 4.9 | 4.2 |
| M6 | 80 | 15 | 6 | 4.9 | 5 |
| M7 | 80 | 15 | 7 | 5.5 | 6 |
| M8 | 90 | 18 | 8 | 6.2 | 6.8 |
| M9 | 90 | 18 | 9 | 7 | 7.8 |
| M10 | 100 | 20 | 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 15 mm, d 6 mm and k 4.9 mm. The DIN 371 spiral flute M6 has Lc 10 mm, although its overall and drive dimensions match.
Use this family to review through holes with space for the cutting lead and chips to emerge. Show component thickness and exit restrictions, then confirm the required pitch, material and holder.
A shared DIN 371 designation does not make spiral point and spiral flute interchangeable. Blind-hole use requires a dedicated bottom-space assessment rather than a nominal-size substitution.
| Product family | Selection boundary to review |
|---|---|
| DIN 376 HSS Spiral Point Machine Tap | Separate reduced-shank reach and forward chip clearance in a DIN 376 point-tap enquiry. |
| DIN 371 HSS Spiral Flute Machine Tap | Choose a DIN 371 blind-hole tool using both flute form and reinforced-shank dimensions. |
| HSS Metric Spiral Point Machine Tap | Keep the chip exit clear when sourcing metric taps for through-hole work. |
Keep the selected family, thread designation and dimensional reference together. Shared nominal sizes or drive shapes do not establish interchangeability.
For DIN 371 spiral point orders, the forward chip path is part of the item definition. Review the point, working length and customer’s exit conditions alongside the reinforced-shank drive dimensions.
Use DIN 371 spiral point in the pack description and attach the complete thread specification. Avoid a generic DIN 371 tap label where blind-hole spiral flute stock is also ordered.
Carry the HSS / HSS-Co requirement with the item drawing when discussing material preparation for this range.
Keep the approved item identity and dimensional revision with components during order discussions. Use the exact thread and drive dimensions to distinguish similar tools.
Check the actual point and the working-section length against the approved sample. A holder-fit check alone cannot distinguish this through-hole choice from the spiral flute version.
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 15 mm, d 6 mm and k 4.9 mm. The DIN 371 spiral flute M6 has Lc 10 mm, although its overall and drive dimensions match. | Avoid holder mismatch, insufficient reach or unintended substitution |
| Geometry / set identity | Check the actual point and the working-section length against the approved sample. A holder-fit check alone cannot distinguish this through-hole choice from the spiral flute version. | 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 |
In a DIN 371 purchase list, separate point and flute geometry into different items. Attach through-hole thickness and exit conditions, keeping the required thread pitch visible even when the source range uses nominal M labels.
Use DIN 371 spiral point in the pack description and attach the complete thread specification. Avoid a generic DIN 371 tap label where blind-hole spiral flute stock is also ordered.
For DIN 371 through-hole work, specify the point form as carefully as the shank size.
Its point geometry directs chips forwards, making a clear through-hole exit central to selection.
No. The chip paths differ, and the M6 cutting lengths differ: 15 mm here versus 10 mm for the spiral flute entry.
A 6 mm shank and 4.9 mm square, with 80 mm overall length. Confirm available engagement and machine travel with the holder.
Check first. The DIN 376 M6 has a 4.5 mm shank and 3.4 mm square, rather than the DIN 371 values.
No such complete pitch range is established. Specify each required pitch with the nominal metric size.
Component thickness, chip-exit space and workpiece grade, plus thread/pitch, L/Lc/d/k, material and quantity. Use a drawing where clearance is restricted.
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.