Machine Nut Tap FZ HSS-G left hand thread - Tr 26 x 5 LH by VÖLKEL, item no. 79148-L, suitable for cutting internal threads.
You cut internal threads in nuts and similar short parts with a machine nut tap. It is designed for machine driven threading where repeatability and throughput matter.
Select the tool by the thread designation and standard in the product name and mount it in a suitable tapping chuck. Use cutting fluid and monitor chip evacuation to protect the thread surface.
Note Clamp the nut securely and align the tool to avoid cross threading. Use a stable feed to control chip load.
Do you need help selecting or using the product?
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| Type of thread | metric ISO- trapezoidal thread |
|---|---|
| Standard | DIN |
| Material | HSS-G |
| Tolerance | 7H |
| Size | Tr 26 x 5 LH |
| Overall length (L1) | 255 mm |
| Thread length (L2) | 165 mm |
| Core hole diameter (D1) | 21.25 mm |
| Shank diameter (D2) | 20.0 mm |
| Drive connector | 16.0 mm |
| Item number | 79148-L |
| Type of flute | straight fluted |
| Application | for through holes |
| Thread standard | DIN 103 |









