M12×250 Dual-Thread Bolt Stainless Steel A2 for PV Mounting with EPDM Seal
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Description
M12×250 Dual-Thread Bolt Stainless Steel A2 for PV Mounting with EPDM Seal
The M12×250 dual-thread bolt made of A2 (1.4301) stainless steel is a key component for fixing photovoltaic structures to timber roof trusses. The set is supplied complete — including flange nuts and an EPDM washer — allowing installation to begin immediately without the need to source additional accessories. One end of the bolt features a wood thread, which is driven directly into the rafter, while the other — metric M12 — is used to secure roof adapters by means of flange nuts. The integrated EPDM washer seals the point of penetration through the roof covering, protecting the structure against leaks. The austenitic A2 stainless steel guarantees exceptional corrosion resistance in all weather conditions — from humid coastal regions to locations exposed to acid rain.
Application and benefits
- Fixing of adapters and triangles in photovoltaic systems on pitched and flat roofs
- Installation on sheet metal, shingle, roofing felt, and ceramic or concrete tile roof coverings
- Complete set with flange nuts and EPDM seal — ready for immediate installation
- Dual thread (wood + metric) eliminates the need for additional expansion plugs
- Austenitic A2 1.4301 steel — non-magnetic, flexible and resistant to stress and corrosion
Technical data
| Product Type | Double-Ended Stud |
| Thread type | M12 |
| Length [mm] | 250 |