The M8 x 30mm Galvanised Steel Bolt with Nut and Washer joins solar rails, brackets and frames. Sold as one bolt and nut and washer set, each fixing arrives ready to fit. Installers, homeowners and farms across South Africa use it on roof and ground mounts exposed to weather.
M8 x 30mm Galvanised Bolt Set Benefits
Length matters more than most buyers expect on a solar frame. A 30mm shank suits joining two thin metal sections, with room left for the nut and washer. Measure the combined thickness first, because thicker brackets change the bolt and nut size you need.
- Galvanised steel finish suits outdoor roof and ground mounts.
- Hex head turns with a standard 13mm spanner.
- Supplied nut and washer complete one fixing per set.
Key Specifications For This Set
- Bolt Size: M8.
- Bolt Length: 30 mm.
- Material: Steel.
- Finish: Galvanised.
- Thread Size: M8.
- Included: 1 × Bolt, 1 × Nut, 1 × Washer.
- Product Type: Hex Bolt Set.
- Application: Solar mounting, brackets, rails and general fastening.
Compatibility And Fit On Solar Mounts
This set fastens solar rails, roof brackets and ground mount frames across the Mounting range. Confirm every hole suits an M8 bolt, since it won’t fit M6 or M10 holes. It works alongside our stitching screws for mounting brackets wherever a through bolt is needed.
Best Use Cases On Site
Fit the washer every time, because it spreads the clamping load and protects the galvanised coating. Snug the nut with a 13mm spanner, but stop before the aluminium rail starts to deform.
- Installers joining rails and brackets on new installs.
- Homeowners adding a bracket to an existing rooftop array.
- Farms fixing ground mount frames and workshop repairs.
Warranty Compliance And Trust Details
Solar Panel Energy ships this set with nationwide delivery across South Africa in 2 to 5 working days. Our professional solar installation team also offers free quotes and system sizing for the full mount. For background on zinc protection outdoors, see this galvanised steel corrosion guidance from Southern African galvanisers.
Frame design under SANS 10160 wind loading stays the installer’s job, not a bolt certification. Earthing and bonding of metal mounts falls under SANS 10142-1, which is the electrician’s responsibility. Registered persons issue the Certificate of Compliance for the solar installation, so it isn’t supplied with the bolt.
- One galvanised M8 x 30mm bolt.
- Matching galvanised M8 nut.
- Single M8 washer for load spreading.
Frequently Asked Questions
What spanner fits an M8 bolt?
Use a 13mm spanner or socket on an M8 hex head. Metric hex head dimensions are listed in the ISO 4017 hexagon head screws standard.
Is 30mm long enough for solar rails?
Thirty millimetres suits two thin metal sections, such as a rail on one of our roof mounting brackets. Measure the combined thickness plus nut and washer before ordering.
Can galvanised bolts sit on aluminium rails?
Galvanised bolts suit aluminium rails and rail link joints when the washer sits between the metals. Keeping the washer in place limits galvanic contact.
Does each set include a nut?
Yes, every M8 x 30mm Galvanised Steel Bolt with Nut and Washer comes as a complete set. Order one set per joint, plus a few spares.
Is galvanised steel rust resistant outdoors?
Zinc galvanising protects steel bolts from rust on outdoor roofs and ground mounts. Scraping the coating during fitting exposes bare steel, so always fit the washer first.
Nationwide delivery takes 2 to 5 working days across South Africa. Add the M8 x 30mm Galvanised Steel Bolt with Nut and Washer to your cart today.
Last Updated: October 2026
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