ECSiNG M6 x 35mm T Rail Adapter 6pcs Stainless Steel Square Head Bolts 20x20mm Accessories for Car Roof Bars, Boxes, Rails Holder

Dimension: Thread: M6; Thread Length: 35 mm/1.37 inches; Head Size: 20 x 20 x 4 mm/0.78 x 0.78 x 0.15 inches Application: the automatic T-slot of the roof box is perfectly adapted to the carrier and secures the roof box. It can be used with a sliding system on many supports. It can also be used to attach bicycle carriers, ski carriers or roof boxes. Square Base: The square head size of the roof box adapter is about 20x20mm, and the large area can withstand the pressure exerted by the roof box. Easy to install, just install it into the socket and use. Material: Made of 304 stainless steel, its characteristics are its strength, corrosion resistance, wear resistance and rust impermeability. What you get: The package includes 6 pieces of T-slot blocks for roof bars.