Join metal parts, with a nut or in a tapped hole, so they can be taken apart.

Pre-assembled triangle bracket STFS Fischer
Key features
- Hole D (mm)8,5
- Tightening torque Tinst10 N·m
- Tightening wrench (mm)13
- Content5x triangles STFS20x hammer-head bolts RHS M8 x 20 A220x flanged nuts MU F M8 A2
- Pieces per pack5
- ThreadM8
What it is
The preassembled STFS Fischer triangle is a modular component designed for the quick construction of support structures and brackets. The pack comprises 5 pieces, supplied with 20 RHS M8 x 20 hammer-head screws in A2 stainless steel and 20 MU F M8 A2 flange nuts. Each triangle has an 8.5 mm hole d and an M8 thread, and must be installed with a tightening torque of 10 N·m using a 13 mm spanner.
These components are used to mount photovoltaic systems on pitched and flat roofs: aluminium profiles, hooks for tiles and pantiles, tilt-angle brackets, bases and module fixing systems.
What it is for
Used for general-purpose fixing into masonry, concrete and timber, for installing building services and plant and for erecting steelwork and structural carpentry.
How to use it
First fix the structure to the roof, with hooks or bases suited to the roof covering, and then fit the profiles and modules with the clamps provided. Observe wind and snow loads and ensure watertightness at the drilled points. Work at height with fall protection.
Where it is used
- Industrial construction
- Residential construction
- Renewable energy (solar PV)
Technical data
- Hole D (mm): 8,5
- Tightening torque Tinst: 10 N·m
- Tightening wrench (mm): 13
- Content: 5x triangles STFS20x hammer-head bolts RHS M8 x 20 A220x flanged nuts MU F M8 A2
- Pieces per pack: 5
- Thread: M8
- Stainless steel: A2
Who it is for
Designed for electricians and solar PV installers.
Related products
- Triangle mounting bracket STFN RL 10°-15°-20° AL Fischer
- Pre-assembled triangle bracket STFN Fischer
- Threaded rod G HDG Fischer — from the category Threaded Rods
- Extended fixing SXR Fischer — from the category Heavy-Duty Anchors
- Sleeve VM Fischer — from the category Hex Nuts
- Browse the whole category: Installation Accessories
Before you order
Tell us the quantities you need and the intended use: if there is a more suitable version, or an equivalent available sooner, we will let you know.
For prices and availability, request a quote from AMES Srl: we will reply with our quotation, delivery times and, where needed, an equivalent technical alternative.
Specifications 7
| Hole D (mm) | 8,5 |
|---|---|
| Tightening torque Tinst | 10 N·m |
| Tightening wrench (mm) | 13 |
| Content | 5x triangles STFS20x hammer-head bolts RHS M8 x 20 A220x flanged nuts MU F M8 A2 |
| Pieces per pack | 5 |
| Thread | M8 |
| Stainless steel | A2 |
Compare with similar models
Technical data declared by the manufacturers. An empty cell means the figure is not declared.
| Feature |
This model
Pre-assembled triangle bracket STFS Fischer
|
Pre-assembled triangle bracket STFN Fischer
|
Triangle mounting bracket STFN RL 10°-15°-20° AL Fischer
|
|---|---|---|---|
| Brand | Fischer | Fischer | Fischer |
| Hole D | 8,5 mm | 9 mm | 9 mm |
| Tightening torque Tinst | 10 N·m | 10 N·m | 10 N·m |
| Tightening wrench | 13 mm | 13 mm | 13 mm |
| Pieces per pack | 5 | 5 | 3 |
| Thread | M8 | M8 | M8 |
| Stainless steel | A2 | A2 | A2 |
| View product → | View product → |
The perfect setup for this job
Everything you need in one place, from functionality to safety.
For the job
Complete the fixing when screwed onto bolts, screws and threaded rods.
Fasten steel sheets, profiles and roofing, even drilling into the metal by themselves.
For safety
Protect against falls from height by supporting the body during work at height.







