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GEFU® thread-rolling screw With flat head and hexalobular drive (Txplus), serrated
DIN 7500-1, case-hardened (-O-) zinc-plated steel, blue passivated (A2K) without anti-friction coating
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For a secure connection in thin sheet metal (up to approx. 520 N/mm²):
- Thread-cutting zone for forming rim holes
- Special round under-head geometry for high tightening and overturning torques
- Play-free and self-locking thread seating => Reduced likelihood of screw working loose => Protection against loss
- Toothing under the head for increased breakaway torque
The suitability of the GEFU for the application or component in question must be determined by preliminary testing!
1. Apply
2. Thread tapping and creation of eyelet in sheet metal
3. Tighten
| Pre-hole diameter recommendations: | |||
| Nominal diameter | Sheet thickness mm | Pre-hole diameter mm | Tightening torque Nm |
| M4 | 0,5 | 2,6 | 2 |
| 0,6 | 2,9 | 2,7 | |
| 0,85 | 3,1 | 3,2 | |
| All specifications are determined empirically for sheets made of material St12 (tensile strength approx. 350 N/mm²) | |||
For a secure connection in thin sheet metal (up to approx. 520 N/mm²)
Select RAL-colour code
!! NOTE: On-screen visualisation of the colour differs from real colour shade!!