Machine Tap DIN 371 Form B HSSE - UNC No. 12 x 24

• Cut internal threads in predrilled holes in mechanical engineering, maintenance, and metal fabrication.
• Use for UNC threads as designated in the product name.
• Use for blind holes or through holes based on lead form and flute geometry.
• Use a machine tap holder or tapping chuck that clamps the shank securely and supports straight entry.
• 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 Verify the exact designation, standard, and tolerance in the product name before you start.

• Simple inspection using a suitable screw or gauge after cleaning the thread.
• Suitable for repeatable workflows in maintenance and serial production setups.
• Consistent internal thread geometry when the tool is guided square to the surface.
• Clear assignment to UNC threads through the designation in the product name.
• Efficient chip transport supported by flute design when correct cutting fluid is used.

• Not suitable for hard to machine materials without defined cutting data and stable machine rigidity.
• Not intended for high output production where dedicated high performance tooling is required.

1. Confirm the thread designation in the product name matches the drawing and the mating screw.
2. Prepare a suitable predrilled hole and deburr the entry for clean lead in.
3. Clamp the tap in a stable machine tap holder or tapping chuck.
4. Align the spindle square to the surface so the tap starts without side load.
5. Apply suitable cutting fluid and start tapping with steady feed.
6. Monitor chip evacuation and reverse out to clear chips if resistance increases.
7. Back out completely and flush the thread to remove chips and fluid residues.
8. Inspect the result with a suitable screw or gauge before assembly.

The provided product data does not include an itemized scope of supply for Machine Tap DIN 371 Form B HSSE - UNC No. 12 x 24. If your process requires accessories such as holders or cutting fluid, select them separately based on your setup.

• Product type: machine tap
• Thread designation: UNC No. 12 x 24
• Thread system: UNC
• Standard: DIN 371
• Tool material: HSSE
• Tolerance class: Class 2B

How do you select the correct variant for your drawing

Match the thread designation in the product name to the drawing and the mating fastener. Confirm thread series, pitch, and class of fit before you start, especially for inch based threads.

Is this tap suitable for blind holes or through holes

The suitability depends on flute geometry and lead form noted in the product name. Spiral flute execution is typically chosen for blind holes because chips are transported out of the hole.

Where can you find technical background information for this tap type

Use this PDF for technical notes, application limits, and terminology. Inch to mm conversion table as PDF

Which tolerance class do you typically achieve

The typical tolerance class for this execution is Class 2B when the process is set up correctly and the hole preparation matches the thread system.

Do you need cutting fluid

Yes, use suitable cutting fluid for the material to reduce friction and control chip formation. Keep lubrication consistent from start to finish and clean the tool after use.

Which holder should you use

Use a holder that clamps the shank securely and supports straight entry. In manual work this is typically a tap wrench, and in machines a tapping chuck or a suitable collet holder.

Where can you find the VÖLKEL catalog for additional variants and technical context

Use the catalog for the full program and selection guidance. VD 23 catalog as PDF