![Aluminium Extrusion Connection with no drilling](https://b3517783.smushcdn.com/3517783/wp-content/uploads/Automatic-Fasteners.jpg?lossy=0&strip=1&webp=1)
![Automatic Fastener Connection Pic3](https://b3517783.smushcdn.com/3517783/wp-content/uploads/Automatic-Fastener-Connection-Pic3.jpg?lossy=0&strip=1&webp=1)
![Auto Fastener Screw](https://b3517783.smushcdn.com/3517783/wp-content/uploads/Auto-Fastener-Screw.jpg?lossy=0&strip=1&webp=1)
L-shaped Hex keys are ideal for tightening the screws.
Automatic Fasteners with a through bore for the fastening screw have a counter-clockwise thread on the outside to prevent the fastener from twisting when the screw is tightened.
![Automatic Fastener Pairs](https://b3517783.smushcdn.com/3517783/wp-content/uploads/Automatic-Fastener-Pairs.jpg?lossy=0&strip=1&webp=1)
Hex Key | Hex Key | |||
a (mm) | S1 | S2 | ||
0.0.391.60 | Automatic-Fastening Set 5, bright zinc-plated | 6.8 | 4 A/F | 3 A/F |
0.0.419.71 | Automatic-Fastening Set 6, bright zinc-plated | 9.5 | 5 A/F | 4 A/F |
0.0.388.08 | Automatic-Fastening Set 8, bright zinc-plated | 13.2 | 6 A/F | 5 A/F |
0.0.441.67 | Automatic-Fastening Set 6, stainless | 9.5 | 5 A/F | 4 A/F |
0.0.440.58 | Automatic-Fastening Set 8, stainless | 13.2 | 6 A/F | 5 A/F |
These fastening sets can be installed easily into existing constructions.