Storage racks and machine area
For replenishment, retain 80 mm overall length and spiral flute in the item definition. Differentiate this range from the shorter straight flute hex taps even when the thread/pitch matches.
THREADING TOOLS / INDUSTRIAL PROCUREMENT
HSS 1/4 Inch Hex Shank Spiral Flute Tap
Combine a defined hex interface with a return-chip flute form for blind-hole selection.
The HSS hex-shank spiral flute tap series lists seven metric combinations, M3 × 0.5 to M12 × 1.75, at 80 mm overall length. Spiral flutes help draw chips towards the hole entrance. The 1/4-inch drive distinguishes it from the round-shank and square-end machine-tap families.
7 defined entriesSize-by-size dimensions for an identifiable purchasing list.
HSSTie the tool-material requirement to the selected application.
Order-line controlKeep the approved geometry and quantities together for replenishment.
- Spiral flute design for blind hole threading.
- 1/4-inch (6.35 mm) hex shank.
- 80 mm overall length across the listed range.
- Listed thread sizes: M3 × 0.5 to M12 × 1.75.
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) | Square / drive k (mm) | Pilot reference (mm) |
|---|---|---|---|---|
| M3x0.5 | 80 | 26 | 6.35 | 2.5 |
| M4x0.7 | 80 | 26 | 6.35 | 3.3 |
| M5x0.8 | 80 | 26 | 6.35 | 4.2 |
| M6x1.0 | 80 | 26 | 6.35 | 5 |
| M8x1.25 | 80 | 25 | 6.35 | 6.8 |
| M10x1.5 | 80 | 25 | 6.35 | 8.5 |
| M12x1.75 | 80 | 25 | 6.35 | 10.3 |
Match pilot-hole preparation to the thread system, workpiece and agreed acceptance requirement.
The M6 × 1.0 entry has L 80 mm and Lc 26 mm with k 6.35 mm. The cutting section is listed as 25 mm for M8, M10 and M12; do not infer the same Lc at every size.
Send the sizes and dimensions your customer needs.Request a Quote →
PRODUCT SELECTION
Application, Chip Path & Selection Limits
Match the component and operation
Review blind-hole depth, bottom allowance and the workpiece’s chip behaviour together. Confirm that the holder supports controlled tapping, reversal and alignment with the 6.35 mm hex interface.
Check the operating boundary
The 80 mm overall length is not a thread-depth rating. A hex interface does not establish impact operation or compatibility with a proprietary quick-change system.
PRODUCT SELECTION
Compare the Adjacent Product Families
| Product family | Selection boundary to review |
|---|---|
| HSS 1/4 Inch Hex Shank Straight Flute Tap | Add a hex-drive tap to the assortment without confusing it with a drill-and-tap tool. |
| HSS Metric Spiral Flute Machine Tap | General metric return-chip spiral flute series for blind-hole selection; retain the published dimensions. |
| 100 mm HSS-Co Extended Shank Machine Tap | Specify 100 mm overall reach while keeping thread depth and chip direction separate. |
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
The 80 mm spiral flute family combines a fixed overall-length brief with a defined hex interface. Carry the blind-hole requirement and size-specific cutting length into the supplier discussion rather than selecting by drive size alone.
Bar-stock handling
Carry the HSS 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 flute form and drive fit on the reference sample. At the larger sizes, check the 25 mm cutting-section entry rather than applying the small-size 26 mm value to the whole range.
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 × 1.0 entry has L 80 mm and Lc 26 mm with k 6.35 mm. The cutting section is listed as 25 mm for M8, M10 and M12; do not infer the same Lc at every size. | Avoid holder mismatch, insufficient reach or unintended substitution |
| Geometry / set identity | Review flute form and drive fit on the reference sample. At the larger sizes, check the 25 mm cutting-section entry rather than applying the small-size 26 mm value to the whole range. | 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 a blind-hole accessory range, keep spiral flute and 80 mm overall length in the item definition. Send the drilled depth and required full thread with the size list so the same hex drive is not mistaken for an equivalent straight flute tap.
Marking, packs & repeat orders
For replenishment, retain 80 mm overall length and spiral flute in the item definition. Differentiate this range from the shorter straight flute hex taps even when the thread/pitch matches.
Turn the selection into a clear purchasing list
Combine a defined hex interface with a return-chip flute form for blind-hole selection.
SELECTION & BUYER QUESTIONS
Product Questions
What is the overall length of this hex spiral flute range?
All seven listed entries are 80 mm overall. The cutting-section length is size-specific and must be read separately.
Why choose spiral flutes for a blind hole?
They help move chips back towards the entrance where there is no exit beneath the thread. Lead clearance and the workpiece still need to be checked.
Is every cutting section 26 mm long?
No. M3 through M6 are listed at 26 mm, while M8, M10 and M12 are listed at 25 mm.
Does the 6.35 mm hex guarantee quick-change compatibility?
No. Check holder engagement, retention and the machine’s tapping requirements. The across-flats dimension alone does not identify a proprietary system.
Can I substitute the hex straight flute tap of the same M-size?
Only after comparing chip direction, overall/cutting lengths and holder engagement. Shared thread and drive sizes do not make the geometries equivalent.
What should accompany an 80 mm hex tap quotation?
Supply metric size/pitch, workpiece, drilled/full-thread depths, holder type, operating mode and quantity. Include any required pack and item-identification instructions.
PRODUCT ENQUIRY
Request a Quote for HSS 1/4 Inch Hex Shank Spiral Flute 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.