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Nuts: Stainless Steel Hex, Flange and T-Nuts for PV Mounting
This category covers nuts for bolted connections, mostly in stainless steel. It includes hexagon nuts, flange nuts, a square nut, threaded inserts and a sliding T-nut. They are used in photovoltaic mounting systems, steel structures and outdoor installations. The range is intended for installers and builders who need to match the nut to the bolt thread and the environment.
What you will find in this category
- Hexagon nuts DIN 934, M6 to M30, in A2 and A4 stainless steel, right-hand metric thread, reusable.
- Flange nuts DIN 6923, M8 and M10, A2 stainless steel (1.4301), with serrated flange.
- Square nut DIN 557, M8, A2 stainless steel (1.4301), for bolted connections in profiles.
- M8 threaded inserts type 28/15, A2 stainless steel, rectangular plate for PV mounting profile grooves.
- M8 sliding T-nut with spring ball, aluminium 6060, for the top rail of PV profiles.
How to choose
- Thread size: match the nut to the bolt, from M6 to M30. Hexagon nuts are available in M6, M8, M10, M12, M14, M16, M20, M24, M27 and M30.
- Steel grade: A2 (1.4301) is corrosion-resistant. A4 nuts are described as acid-resistant. Check the strength class, for example A2-70, A4-80 or A4-50.
- Nut type: use hexagon nuts for general connections. Choose a flange nut where vibration may loosen the joint. A square nut or threaded insert holds in the profile groove.
- Profile fit: for PV rails, check whether you need a T-nut, a threaded insert (23.0 x 13.0 x 4.0 mm on the listed M8 version) or a nut with a washer-type flange.
Typical applications
Most products here are intended for photovoltaic installations. Flange nuts fasten roof hooks and mounting triangles to aluminium profiles. The T-nut and threaded inserts fix mid and end clamps and brackets in the profile groove. Larger hexagon nuts suit steel structures and outdoor installations.
Frequently asked questions
What is the difference between A2 and A4 nuts?
A2 nuts here are described as corrosion-resistant and A4 nuts as acid-resistant. Both are stainless steel. The range includes A2-50, A2-70, A4-50, A4-70 and A4-80 hexagon nuts, depending on size.
Why use a DIN 6923 flange nut?
The serrated flange increases holding force and prevents self-loosening caused by vibration and torque. The M8 and M10 versions are used to fasten roof hooks and mounting triangles to aluminium profiles.
How does the sliding T-nut stay in the profile?
Its spring ball stops the T-nut falling out of the profile groove before the bolt is tightened. The nut stays in position while you work.
Not sure which nut suits your bolt or profile? Ask our technical support for help with selection.