Dual-thread bolt M12×300 mm stainless steel A2 – PV mounting to rafters
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Description
Dual-thread bolt M12×300 mm stainless steel A2 – PV mounting to rafters
The M12×300 mm dual-thread bolt made of A2 (1.4301) stainless steel is a key component for fastening photovoltaic structures to wooden roof rafters. The complete set includes flange nuts and an EPDM washer, which seals the point of penetration through the roof covering — there is no need to order separate seals or washers. The dual-thread design features two different thread types: the wood-threaded end is screwed directly into the rafter, while the M12 metric end is used to secure roof adapters using the included flange nuts. The austenitic A2 stainless steel guarantees exceptional corrosion resistance thanks to the nickel content in the alloy, ensuring the bolt retains its full parameters in all weather conditions throughout the entire service life of the PV installation.
Application and compatibility
- Installation of adapters and triangles for photovoltaic systems on pitched and flat roofs
- Roof coverings: metal roof tiles, trapezoidal sheet, shingles, roofing felt
- Threaded end screwed directly into the wooden roof structure — no expansion plugs required
- The integrated flange washer with EPDM seal ensures tightness at the point of contact with the covering
- Complete ready-to-install set — the bolt is sold with flange nuts and an EPDM washer
Technical data
| Product Type | Double-Ended Stud |
| Thread type | M12 |
| Length [mm] | 300 |