The three-hole lock nut is fixed with a three-hole flange, which is safer and can be used longer. The flange nut is made of high quality galvanized iron. Galvanized treatment is not easy to rust. 5-piece galvanized flange t-nuts have smooth surface, no burrs and high practicability. Flanged nuts are available in different sizes to meet different needs, M6 M8 M10. Widely used, mainly suitable for DIY, fixing and connecting wood, very practical.