This second hand tap is an HSS-G threading tool for producing metric fine internal threads in predrilled holes during workshop repair, maintenance, or small batch machining. You select it by the complete M 15 x 1.5 designation, ISO 529 design reference, Form D chamfer, tolerance class ISO2 6H, and right hand thread direction.
MF denotes the metric fine thread family, where the pitch is finer than a comparable coarse metric thread and must match the drawing exactly. HSS-G indicates a ground high speed steel execution, which supports defined cutting edges and repeatable hand tapping when lubrication and alignment are controlled. The right hand version is used when the drawing or mating part follows the standard fastening direction. The SML product data gives a core hole diameter of 13.5 mm and an overall length of 95 mm, so drilling, reach, and holder setup can be planned before cutting.
- Cut metric fine internal threads in drilled holes where a controlled manual tapping process is required.
- Use Form D second chamfer after the starting operation when the thread must be guided toward full profile depth.
- Match the M 15 x 1.5 designation to the drawing, mating screw, and required right hand thread before machining.
- Use a tap wrench or guided hand tapping setup to keep the tool square to the hole axis.
- Prepare the core hole according to the stated 13.5 mm drilling value before starting the thread.
- 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 Use the second tap after the thread entry is started, keep the tap aligned, and stop if torque rises suddenly.
- ISO 529 design reference supports clear identification of the hand tap family in drawings and product data.
- Form D second geometry supports a staged hand tapping sequence between starting and finishing operations.
- HSS-G execution links the tool choice to ground high speed steel rather than an unspecified cutting material.
- Tolerance class ISO2 6H helps align the tapped internal thread with the required fit class.
- The stated core hole diameter gives a direct preparation value for drilling before tapping.
Drawbacks
- Manual tapping depends on operator alignment, so tilted entry can damage the internal thread.
- The tool is not a replacement for a guided machine tapping process when repeatability, feed control, or coolant delivery must be validated.
- Match the complete M 15 x 1.5 thread designation, direction, and tolerance requirement with the drawing or mating part.
- Prepare the core hole according to the documented drilling data.
- Chamfer the hole entry to support centred starting.
- Mount the hand tap in a suitable tap wrench.
- Align the hand tap square to the hole axis.
- Apply cutting fluid that fits the work material.
- Start the cut with steady torque and controlled feed.
- Reverse briefly at intervals to clear chips from the flutes.
- Withdraw the tool carefully after the required thread depth is reached.
- 1 piece Hand Tap Second ISO 529 Form D HSS-G - M 15 x 1.5
- Product type: Hand tap
- Tap stage: Second
- Standard: ISO 529
- Chamfer form: Form D
- Flute form code: N
- Thread system: MF
- Thread size: M 15 x 1.5
- Thread standard: DIN 13
- Thread direction: Right hand thread
- Tolerance class: ISO2 6H
- Tool material or execution: HSS-G
- Overall length L1: 95 mm
- Thread length L2: 30 mm
- Shank diameter D2: 12.5 mm
- Square drive k: 9 mm
- Core hole diameter: 13.5 mm
- Packaging unit: 1 piece
- How do you confirm that this hand tap matches the required thread?
Match the full M 15 x 1.5 designation, right hand thread, tolerance class ISO2 6H, and thread standard DIN 13 against the drawing or mating part before you cut.
- What does MF mean in the thread designation?
MF denotes the metric fine thread family, where the pitch is finer than a comparable coarse metric thread and must match the drawing exactly.
- Where can you find detailed technical notes for hand taps?
Technical information hand taps as PDF
- When do you use a second hand tap in the tapping sequence?
A Form D second hand tap is used after the thread has been started, so the profile can be developed further with controlled guidance.
- Why does the core hole diameter matter before tapping?
The core hole diameter of 13.5 mm controls how much material the hand tap removes and how much torque is needed during cutting.
- What should you check before ordering a metric fine hand tap?
Check the complete diameter and pitch because metric fine threads can look similar to coarse metric threads but do not match the same mating screw.
- Where can you find catalog information for this threading tool?
VD 23 catalog as PDF
- How do you reduce the risk of tap breakage during manual use?
Keep the tool aligned, use cutting fluid, avoid side load, and clear chips before torque becomes excessive.
Do you need help selecting or using the product?
Use the contact form
In this category: Threading tools
