STI Hand Tap ISO 529 HSS-G - M 39 x 4.0

• Cutting or reworking internal threads when controlled hand guidance is preferred
• Starting the tap carefully so the tool tracks on axis and follows the intended thread direction
• Using the tool in maintenance, fixture work and smaller batch production where direct feel is valuable
• Process: manual driving or assisted driving depending on your holder and machine setup
• Use: thread cutting, re tapping, and thread cleaning depending on condition

Note Select the product by thread designation, workpiece condition and the holder concept used in your process.

• Thread related geometry and designation are clearly assigned in the product name for practical selection
• Suitable for workshop, maintenance and machine room workflows with repeatable tool use
• The explicit standard and material markings support controlled tool assignment in professional use
• A dedicated threading tool reduces compromise compared with improvised general purpose tooling

• Tool selection still depends on matching the thread system, material and process type to the actual job.
• It is intended for defined threading work and not for undirected high speed use without the correct setup and lubrication strategy.

1. Prepare the hole and fit the STI hand tap into a suitable tap holder.
2. Position the tap square to the bore and start the thread carefully by hand guidance.
3. Continue the cut with controlled turning while keeping the tool aligned.
4. Reverse the tap as needed to clear the cutting path and maintain smooth running.
5. Remove the tool after the receiving thread is complete and clean the bore.
6. Check the prepared thread before installing the wire insert.

• 1 piece STI Hand Tap ISO 529 HSS-G - M 39 x 4.0

• Product type: STI hand tap
• Thread system: Metric ISO
• Standard: ISO 529
• Tool material or finish: HSS-G

What do you use STI Hand Tap ISO 529 HSS-G - M 39 x 4.0 for?

You use this product for a defined threading step such as internal thread cutting, external thread cutting, hole preparation or controlled tool handling depending on the product type.

Where can you find more technical background?

For additional technical background, see Technical information hand taps as PDF.

When is hand guidance useful?

Hand guidance is useful when you want close control during thread entry, rework or maintenance work on individual parts and smaller series.

Where can you find one more related technical reference?

For a second related reference, see Inch to mm conversion table as PDF.

What does the Metric ISO designation mean?

M denotes the ISO metric thread system used widely in mechanical engineering, maintenance and general fastener work where metric screw threads are standard.

Where can you find the catalog entry for this product group?

For catalog level orientation, see VD 23 catalog as PDF.

What should you check after the operation?

Check the thread entry, running behavior and general fit with the mating part or the next process step before releasing the workpiece.

How do you protect tool life in daily use?

Use stable alignment, suitable lubrication and a holder concept that matches the torque and guidance demands of the product.