CE compliant – Regulation (EU) No. 305/2011
Standard: DIN EN ISO 13918 – Type MD (formerly MPF)
Available materials: Steel 4.8 / A2-50 / 1.4571
Cold-rolled thread: Tolerance 6g
Included in DIN EN ISO 13918 since 2018
Product description – MD threaded stud
The BEARFIX® MD nearly full-threaded stud is designed for drawn arc stud welding with ceramic ferrule and provides a robust solution where high mechanical strength and an almost full-length threaded fastening are required.
The MD type was incorporated into DIN EN ISO 13918:2018 and is essentially equivalent to the former non-standard MPF type. The thread extends almost to the welding tip. The unthreaded section at the tip corresponds approximately to the thread pitch diameter, producing a weld bead around 3–4 mm larger than the external thread diameter.
The supplied ceramic ferrule protects the weld pool and helps produce uniform, high-quality welds.
Main applications
- Structural fastening of threaded components
- Joints requiring high mechanical strength
- Machinery and industrial equipment
- Sheet-metal fabrication and steel structures
- Stainless-steel applications
- Automotive and appliance industries
Technical advantages
- Nearly full thread – maximum usable thread length
- International standard – DIN EN ISO 13918:2018
- Cold-rolled thread – high strength and accuracy
- Excellent weldability – aluminium ball at the welding tip stabilises the arc
- Multiple materials – steel 4.8, A2-50 or 1.4571
Standard dimensions
| Thread | l2 (mm) | y (mm) | d2 (mm) | d3 (mm)* | h (mm)* | Steel 4.8 article No. | Ceramic ferrule |
|---|---|---|---|---|---|---|---|
| M6 | 15–100 | 5.5 | 5.3 | 8.5 | 4 | 46-06-XXX-MPF | UF 6 |
| M8 | 15–100 | 6 | 7.1 | 10 | 3 | 46-08-XXX-MPF | KSP-F 8 |
| M10 | 15–100 | 6.5 | 8.9 | 12.5 | 3.5 | 46-10-XXX-MPF | KSP-F 10 |
| M12 | 20–100 | 7.5 | 10.8 | 14.5 | 4.5 | 46-12-XXX-MPF | KSP-F 12 |
| M16 | 30–100 | 11 | 14.6 | 17.8 | 5.8 | 46-16-XXX-MPF | KSP-F 16 |
| M20 | 35–100 | 13 | 18.3 | 22.5 | 6.6 | 46-20-XXX-MPF | KSP-F 20 |
* d3 and h are approximate. The weld bead is approximately 3–4 mm larger than the external thread diameter. ✔ Replace XXX with the required length. ✔ A2-50 and 1.4571 versions available.
Standards and certificates
- CE marking according to Regulation (EU) No. 305/2011
- DIN EN ISO 13918:2018 – Type MD
- DIN EN ISO 14555 – Stud welding
- DIN EN 10204 inspection certificates on request
BEARFIX® – Fastening and welding solutions for structural engineering.