Standard Fasteners are a popular choice for connecting to aluminium profiles at a right-angle.  A number of sizes are available which correspond to the line of aluminium profile used.

The necessary thread (b) is tapped directly into the core bore of the profile.

A drill hole (a) is required for the Hex key to access the fastener when it is in place.

Position of the through holes for the Hex key

Standard Fastening Set 5Standard Fastening Set 6Standard Fastening Set 8Standard Fastening Set 8E
aØ 4.3mmØ 5.5mmØ 7mmØ 7mm
bM5
12mm deep
M6
15mm deep
M8
18mm deep
c20mm30mm40mm40mm
d10mm15mm20mm20mm

The standard connecting plates can be arranged to match the way in which the profiles are fitted.
Large profiles with high load-bearing capabilities can be connected using a larger number of Standard Fasteners.