Patent ID: 8727656

Claim:
A fastening device ( 800 , 830 , 860 ), comprising: a non-circularly cylindrical part ( 810 , 840 , 870 ), wherein the fastening device is arranged to be inserted into, and engage with a metal profile ( 230 , 280 ), a two-dimensional cross-section of which metal profile, perpendicularly to a longitudinal direction (N) of the profile, comprises a hole ( 234 ) and an opening ( 235 ) out from the hole, via which the hole opens out from the metal profile, wherein the opening in the said cross-section is narrower than a cross-sectional dimension of the hole perpendicularly to a main direction of extension (M) of the opening, wherein said fastening device can be inserted into the metal profile in the said longitudinal direction, and then slid along the metal profile, wherein the two-dimensional cross-section of the cylindrical part comprises a first part ( 811 , 841 , 871 ) with a first width, arranged to be accommodated in the hole in the metal profile, as well as a second part ( 812 , 841 , 872 ) with a second width, which second width is smaller than the first width, arranged to be accommodated in the opening in the metal profile, a through hole ( 813 , 843 , 873 ) comprising a first end ( 813 a , 843 a , 873 a ) and a second ( 813 b , 843 b , 873 b ) end, which first end opens out outside of the said hole in the metal profile when the fastening device engages with the metal profile, and which through hole is arranged to receive a fastener ( 820 ; 850 ) arranged to engage with the metal profile, wherein the fastener ( 820 , 850 ) is a stop screw arranged to be screwed in through the through hole ( 813 , 843 , 873 ), and the screw, and when screwed into the through hole, is arranged to apply a pressure to the metal profile and thereby to lock a position of the fastening device along the metal profile ( 230 , 280 ).