Storage racks and machine area
Distinguish DIN 376 point and flute families in the requested labels and size list. Keep the sample/drawing reference with the larger sizes, where overall length does not represent the usable full-thread depth.
Separate reduced-shank reach and forward chip clearance in a DIN 376 point-tap enquiry.
The DIN 376 spiral point machine tap range lists 18 nominal metric sizes from M3 to M24. A reduced-shank dimensional family is paired with forward chip evacuation. It provides a separate option from the reduced-shank spiral flute family for distributors supplying through-hole tooling.
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) |
|---|---|---|---|---|---|
| M3 | 56 | 9 | 2.2 | - | 2.5 |
| M3.5 | 56 | 11 | 2.5 | 2.1 | 2.9 |
| M4 | 63 | 12 | 2.8 | 2.1 | 3.3 |
| M4.5 | 70 | 13 | 3.5 | 2.7 | 3.7 |
| M5 | 70 | 13 | 3.5 | 2.7 | 4.2 |
| M6 | 80 | 15 | 4.5 | 3.4 | 5 |
| M7 | 80 | 15 | 5.5 | 4.3 | 6 |
| M8 | 90 | 18 | 6 | 4.9 | 6.8 |
| M9 | 90 | 18 | 7 | 5.5 | 7.8 |
| M10 | 100 | 20 | 7 | 5.5 | 8.5 |
| M11 | 100 | 20 | 8 | 6.2 | 9.5 |
| M12 | 110 | 23 | 9 | 7 | 10.2 |
| M14 | 110 | 25 | 11 | 9 | 12 |
| M16 | 110 | 25 | 12 | 9 | 14 |
| M18 | 125 | 30 | 14 | 11 | 15.5 |
| M20 | 140 | 30 | 16 | 12 | 17.5 |
| M22 | 140 | 30 | 18 | 14.5 | 19.5 |
| M24 | 160 | 36 | 18 | 14.5 | 21 |
Match pilot-hole preparation to the thread system, workpiece and agreed acceptance requirement.
The M6 item has L 80 mm, Lc 15 mm, d 4.5 mm and k 3.4 mm. At M24 the listed overall length is 160 mm and Lc is 36 mm; those lengths are not full-thread depth ratings.
Review the hole exit and the holder interface independently. The reduced shank can be relevant to the tool envelope, while the point form needs space for chips beyond the workpiece.
Do not assume the reduced shank guarantees passage through an arbitrary bore or that forward chip evacuation suits every blind hole. Thread pitch, lead allowance and material conditions still need specification.
| Product family | Selection boundary to review |
|---|---|
| DIN 371 HSS Spiral Point Machine Tap | For DIN 371 through-hole work, specify the point form as carefully as the shank size. |
| DIN 376 HSS Spiral Flute Machine Tap | Keep the reduced-shank blind-hole tap separate from DIN 371 stock with the same thread label. |
| DIN 376 HSS Straight Flute Machine Tap | Specify the reduced-shank straight-flute family without losing the drive dimensions on the order. |
Keep the selected family, thread designation and dimensional reference together. Shared nominal sizes or drive shapes do not establish interchangeability.
This DIN 376 order brief combines reduced-shank dimensions with a forward-chip point. Review those two requirements independently with the component drawing before treating a nearby tap as an equivalent.
Distinguish DIN 376 point and flute families in the requested labels and size list. Keep the sample/drawing reference with the larger sizes, where overall length does not represent the usable full-thread depth.
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.
Use the sample to verify the point geometry, reduced-shank transition and relevant square dimension. Agree the M3 interface by drawing where the source does not give a square value.
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 | The M6 item has L 80 mm, Lc 15 mm, d 4.5 mm and k 3.4 mm. At M24 the listed overall length is 160 mm and Lc is 36 mm; those lengths are not full-thread depth ratings. | Avoid holder mismatch, insufficient reach or unintended substitution |
| Geometry / set identity | Use the sample to verify the point geometry, reduced-shank transition and relevant square dimension. Agree the M3 interface by drawing where the source does not give a square value. | 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 |
Build DIN 376 point-tap orders around the complete thread and drive dimensions. Keep the through-hole application and sample reference on the purchase record so point and flute tools with similar external sizes remain separate.
Distinguish DIN 376 point and flute families in the requested labels and size list. Keep the sample/drawing reference with the larger sizes, where overall length does not represent the usable full-thread depth.
Separate reduced-shank reach and forward chip clearance in a DIN 376 point-tap enquiry.
The point sends chips forwards; the flute form carries them towards the entrance. Their working-section lengths also differ at several sizes.
L 80 mm, Lc 15 mm, d 4.5 mm and k 3.4 mm are listed. Compare the complete interface and available exit space.
No. That is overall length. The M24 cutting section is listed as 36 mm, and full-thread reach needs lead and clearance allowances.
No. Compare the shank, shoulder, holder and component bore dimensions, as well as chip exit and available travel.
The source does not specify that value. Include an interface drawing or sample requirement rather than copying a neighbouring size.
State point geometry, exact size/pitch, L/Lc/d/k, material and approved reference. Include workpiece thickness, exit conditions, quantities and requested packaging.
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.