Storage racks and machine area
Keep DIN 371 and straight flute together in the requested label wording. List exact pitch and drive dimensions in the purchasing specification when DIN 376 items are also part of the stock programme.
THREADING TOOLS / INDUSTRIAL PROCUREMENT
DIN 371 HSS Straight Flute Machine Tap
Keep the DIN 371 shank dimensions explicit when a customer asks for a straight-flute replacement.
The DIN 371 HSS straight flute machine tap range lists ten metric sizes from M3 to M10. Specify HSS or HSS-Co with the workpiece requirement. This page serves DIN-specific dimensional replacement enquiries, rather than the broader general metric straight flute assortment.
10 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.
- DIN 371 straight flute geometry.
- HSS and HSS-Co material options.
- Metric 6H marking.
- Listed sizes: M3–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) |
|---|---|---|---|---|---|
| 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.
At M6, L is 80 mm, Lc 15 mm, d 6 mm and k 4.9 mm. The DIN 376 M6 straight flute alternative has a 4.5 mm shank and 3.4 mm square, despite sharing the nominal size and overall length.
Send the sizes and dimensions your customer needs.Request a Quote →
PRODUCT SELECTION
Application, Chip Path & Selection Limits
Match the component and operation
Choose straight flute geometry against the workpiece and chip behaviour, then use the DIN 371 dimensions to review holder fit and access. Specify the required pitch because the size table uses nominal M designations.
Check the operating boundary
DIN 371 identifies a dimensional family; it does not by itself establish a material-specific cutting speed or a universal hole application. Straight flute does not mean through holes only.
PRODUCT SELECTION
Compare the Adjacent Product Families
| Product family | Selection boundary to review |
|---|---|
| DIN 376 HSS Straight Flute Machine Tap | Specify the reduced-shank straight-flute family without losing the drive dimensions on the order. |
| HSS Metric Straight Flute Machine Tap | Build a metric assortment around the actual shank and square dimensions—not thread size alone. |
| DIN 371 HSS Spiral Flute Machine Tap | Choose a DIN 371 blind-hole tool using both flute form and reinforced-shank dimensions. |
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
A DIN 371 straight flute replacement should be reviewed against the reinforced-shank dimensional entry and required pitch. The supplier discussion needs the customer’s holder interface, not only a DIN label.
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
Use the M-size, required pitch and d/k interface as independent acceptance points. The DIN label is not enough to verify that the tool will engage the existing holder.
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 | At M6, L is 80 mm, Lc 15 mm, d 6 mm and k 4.9 mm. The DIN 376 M6 straight flute alternative has a 4.5 mm shank and 3.4 mm square, despite sharing the nominal size and overall length. | Avoid holder mismatch, insufficient reach or unintended substitution |
| Geometry / set identity | Use the M-size, required pitch and d/k interface as independent acceptance points. The DIN label is not enough to verify that the tool will engage the existing holder. | 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
For DIN 371 stock orders, keep the dimensional family and the requested pitch in the item code or specification. Replenish against the approved d/k dimensions so purchasing does not substitute the reduced-shank DIN 376 item.
Marking, packs & repeat orders
Keep DIN 371 and straight flute together in the requested label wording. List exact pitch and drive dimensions in the purchasing specification when DIN 376 items are also part of the stock programme.
Turn the selection into a clear purchasing list
Keep the DIN 371 shank dimensions explicit when a customer asks for a straight-flute replacement.
SELECTION & BUYER QUESTIONS
Product Questions
How does DIN 371 differ from DIN 376 for this straight flute range?
The listed drive dimensions differ. At M6, DIN 371 has d 6 mm and k 4.9 mm, compared with d 4.5 mm and k 3.4 mm in DIN 376.
Which sizes are listed on the DIN 371 straight flute page?
Ten nominal sizes from M3 through M10, including intermediate sizes shown in the table. Give the required pitch with each M designation.
Can DIN 371 M6 replace the general metric M6 straight flute tap?
Compare the complete dimensions first. The general series has L 72 mm, d 6.3 mm and k 5 mm; this DIN 371 row has L 80 mm, d 6 mm and k 4.9 mm.
Does DIN 371 define the workpiece material?
No. Supply the component grade and condition along with the tool-material requirement. The dimensional designation does not establish suitability for every metal.
Is a straight flute DIN 371 tap only for through holes?
Not as an unconditional rule. Hole form, lead, chip behaviour and clearance must be assessed for the application.
What prevents a wrong DIN 371 replacement order?
Specify the exact size/pitch, flute form, L/Lc/d/k, tool material and approved drawing. Include holder and workpiece information rather than ordering DIN tap alone.
PRODUCT ENQUIRY
Request a Quote for DIN 371 HSS Straight 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.