Suggested to use M3 T nut and screws if you fix it to 20 series EU Al-profile
High Quality:Made of Bearing Steel with low friction coefficients.It worked great and had no resistance in the bearings when put on a rail.And it works beautifully for both slider motion as well as panning.
Widely Use:Applied in semiconductor manufacturing equipment, printed circuit boards, IC assembly equipment, medical equipment, robotic arms, precision measurement machine and other small linear motion device.
Several lengths available: 300mm, (12 holes), 350mm, 14 (holes), 400mm, (16 holes), For connecting the rail to the machine via M3 bolts and nuts.