Manufactured in galvanized steel. Top grip nut for fixing clamps or other elements to the pierced or drilled FIXTRUT profiles supports. Composed by a rhomboid nut and a riveted anti-turn junction. Dented at the inside of the profile which provides additional adhesion and guarantees the fixing of FIXTRUT accessories. It can be mounted on the profile by sliding it laterally, or by opening the profile with a propeller-type turn. For different clamps or loads, are made of M8: lengths 40 and 60 and M10 lengths 40 and 60. Dimensions adaptable to the whole range of drilled profiles FIXTRUT.