Keep two-member lead geometry and set completeness explicit in a metric hand-tap order.
This fully ground HSS metric tap range is supplied as two-piece sets, not three-piece sets. Fifteen size-and-pitch combinations span M3 × 0.5 to M30 × 3.5. The listed lead lengths are six threads for the first tap and three threads for the second.
Dimensions are in millimetres except thread designations, drive labels and lead counts. Read each column with the dimension reference below.
| Thread / designation | Overall length (mm) | Cutting length (mm) | Shank diameter (mm) | Square end (mm) | First-tap lead (threads) | Second-tap lead (threads) |
|---|---|---|---|---|---|---|
| M3x0.5 | 48 | 11 | 2.24 | 1.8 | 6 | 3 |
| M4x0.7 | 50 | 13 | 3.15 | 2.5 | 6 | 3 |
| M5x0.8 | 58 | 16 | 4 | 3.15 | 6 | 3 |
| M6x1.0 | 66 | 19 | 4.5 | 3.55 | 6 | 3 |
| M8x1.25 | 72 | 22 | 6.3 | 5 | 6 | 3 |
| M10x1.5 | 82 | 24 | 8 | 6.3 | 6 | 3 |
| M12x1.75 | 89 | 29 | 9 | 7.1 | 6 | 3 |
| M14x2.0 | 95 | 30 | 11.2 | 9 | 6 | 3 |
| M16x2.0 | 102 | 32 | 12.5 | 10 | 6 | 3 |
| M18x2.5 | 112 | 37 | 14 | 11.2 | 6 | 3 |
| M20x2.5 | 112 | 37 | 14 | 11.2 | 6 | 3 |
| M22x2.5 | 118 | 38 | 16 | 12.5 | 6 | 3 |
| M24x3.0 | 130 | 45 | 18 | 14 | 6 | 3 |
| M27x3.0 | 135 | 45 | 20 | 16 | 6 | 3 |
| M30x3.5 | 138 | 48 | 20 | 16 | 6 | 3 |
Use the labelled dimensions with the component and holder drawings.
M6 × 1.0 is listed at 66 mm overall length, 19 mm cutting length, 4.5 mm shank and 3.55 mm square. The lead counts describe the cutting entry, not the number of complete turns the tool can produce.
Use the required hole and full-thread depth to review the two-member sequence. The six-thread and three-thread lead descriptions help distinguish the members, but the sequence must still match the application.
A shorter lead does not mean zero bottom allowance. Do not assume a third bottoming member is included, or infer a complete national standard number from a family designation.
| Product family | Selection boundary to review |
|---|---|
| HSS Metric Three-Piece Hand Tap Sets | Keep a three-piece hand-tapping set together through ordering, sample approval and replenishment. |
| DIN 352 HSS Three Piece Hand Tap Set | Specify the DIN 352 three-piece set and its dimensional series—not just three metric taps. |
| HSS Straight Shank Nut Tap | Source the nut-tapping geometry with the machine interface and nut blank—not an ordinary tap by M-size. |
Keep the selected family, thread designation and dimensional reference together. Shared nominal sizes or drive shapes do not establish interchangeability.
Two-piece sets need an explicit member sequence and a different count basis from three-piece stock. Review the six-thread first lead and three-thread second lead with the chosen size before agreeing the set record.
Request identification for both first and second members and state the number of complete two-piece sets. A mixed assortment should list set contents explicitly rather than implying a third member from a general hand-tap label.
Carry the HSS 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. Separate set members and complete-set quantities.
Count and identify both members against the agreed lead specification. A complete two-piece set is a different acceptance item from an incomplete three-piece set, even if the nominal thread matches.
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 × 1.0 is listed at 66 mm overall length, 19 mm cutting length, 4.5 mm shank and 3.55 mm square. The lead counts describe the cutting entry, not the number of complete turns the tool can produce. | Avoid holder mismatch, insufficient reach or unintended substitution |
| Geometry / set identity | Count and identify both members against the agreed lead specification. A complete two-piece set is a different acceptance item from an incomplete three-piece set, even if the nominal thread matches. | 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 |
For two-piece set orders, list set quantities separately from loose-tool quantities. Keep first/second member identification and the approved thread/pitch together on the packing brief, especially where three-piece metric stock is also purchased.
Request identification for both first and second members and state the number of complete two-piece sets. A mixed assortment should list set contents explicitly rather than implying a third member from a general hand-tap label.
Keep two-member lead geometry and set completeness explicit in a metric hand-tap order.
Two. The source lists a first tap with a six-thread lead and a second with a three-thread lead; no third member is included by that description.
No. It is a separately specified product with its own member sequence and dimensions. Do not substitute members from another set without a geometry check.
No. It describes the cutting lead. Required full-thread depth, working length and bottom clearance remain separate selection factors.
M6 × 1.0 is listed at L 66 mm, cutting length 19 mm, shank 4.5 mm and square 3.55 mm.
No. If a particular standard and revision are required, provide them with the dimensional and thread specification for review.
Use two-piece set, exact size/pitch, both lead counts, drive dimensions and approved sample reference. Order by set count and identify any loose-member request separately.
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.