Automatic-Fastening Set 8 N D40 can be used for connecting Profiles 8 D40 with other Profiles 8 D40, or for connecting Profiles 8 with rectangular cross-sections if an Adapter 8 D40 (Section 1.2 Accessories for Profiles) is used. When using this Automatic-Fastening Set with open-groove profiles, the profiles require no processing - the self-tapping Automatic Fastener is simply screwed into the profile groove from the end face.

When using Profiles 8 with closed grooves, a 20 mm dia. mounting bore must be drilled at a distance of 40 mm from the end face in order to access the fastening screw.

Automatic-Fastening Set 8 N D40 can be used to connect Profiles 8 with both open and closed grooves (where designed for opening). To cover the mounting bore in the side face of profiles with closed grooves, Automatic-Fastening Set 8 N D40 contains Caps for Profiles 8 with rectangular and round cross-sections. Depending on the profile attached, the Cap with a rounded or flat outer contour will be used. In the case of Profiles 8 with open grooves, no bore is needed. Consequently, the Caps are not required in this instance.

The length of the screw in Automatic-Fastening Set 8 N D40 is matched to the thickness of Adapter 8 D40. The full length of the thread is therefore available in order to ensure that the maximum fastening force is applied.

The Automatic Fastener is screwed into the groove in the end face of a Line 8 Profile (anti-clockwise thread). Hexagon Socket Head Cap Screw M6 is held captive in the internal thread of the Automatic Fastener.

Automatic-Fastening Sets should always be used in pairs.