Keywords: T nut, T-nut, T head nut, hammer head nut, hammer nut, Description: 1.T nut also known as hammer head nut. 2.Put it into the slot directly from outside of profiles when assembling, clockwise 90 degrees it canbe automatically locked. 3.Extremely easy to install 4.It is also one of the most commonly used accessories for aluminum system. 5.Detailed size infomation, please contact us for offering. Material: carbon steel Surface treatment: nickel plated Application: for Korea market