Currently, we have two sliding nuts, one is made of steel, and the other is made of aluminum, both of them are used for 40*40 rail, and easy installed, like below picture. The special feature of this product is that there is a small ball at the bottom of this product. When the nut enters the rail, the small ball will push against the bottom, making the nut push against the opening above the track.

SIC Solar is a professional manufacturer of solar mounting systems. Customized solar panel mounting brackets and ground mount solar. Inquiry now! Email: info@sic-solar.com