Products
Structural steel and sections
C+ and Z purlins
Plasterboard supports
Solar mounting systems
Bolts and screws
Hammer-head bolts, bolts, nuts and washers
Drill-free fixing with hammer-head bolts in the rail perforations. Lock nuts mandatory on connections subject to vibration.

Characteristics
- M8Torque 14 – 18 N·m
- M10Torque 28 – 35 N·m
- M8 lock nut14 N·m max
Benefits
- No drilling on site
- Tightening torques given per reference
- EPDM washer at the interface with the aluminium frame
Applications
- Rail / fixing connection
- Rail / rail connection
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| Reference | Description | Dimensions | Material | Tightening torque |
|---|---|---|---|---|
BLT-M8-THM-A4 | M8 hammer-head bolt · A4 stainless | M8 × 25 – 60 mm | A4-70 stainless | 14 – 18 N·m |
BLT-M10-THM-A4 | M10 hammer-head bolt · A4 stainless | M10 × 25 – 80 mm | A4-70 stainless | 28 – 35 N·m |
BLT-M8-THM-GV | M8 hammer-head bolt · galvanised | M8 × 25 – 60 mm | Galvanised steel cl. 8.8 | 14 – 18 N·m |
BLT-M10-HEX-A4 | M10 hex bolt · A4 stainless | M10 × 25 – 80 mm | A4-80 stainless | 28 – 35 N·m |
ECR-M8-BLK | M8 lock nut | M8 | A4 stainless / galvanised | 14 N·m max |
RON-M8-EPDM | M8 washer + EPDM seal | ID 8.4 mm | Stainless + EPDM | Aluminium frame interface |
Lock nuts mandatory on connections subject to vibration (wind, trackers).
BLT-M8-THM-A4
BLT-M10-THM-A4
BLT-M8-THM-GV
BLT-M10-HEX-A4
ECR-M8-BLK
RON-M8-EPDM