What is a hanger screw?

You may be wondering how the legs of the table and chair are magically fixed to the table, usually without obvious hardware traces. In fact, what keeps them in place is not magic at all, but a simple device called a hanger screw, or sometimes a hanger bolt.

hanger screw


A hanger screw is a headless screw designed to be driven into wood or other soft materials. One end has a wooden thread, one end is pointed, and the other end is a machine thread. Two threads may intersect in the middle, or there may be a non-threaded shaft in the center. Hanger screws have threads of various sizes, for example, 1/4 inch (64 cm) or 5/16 inch (79 cm). The thread length may vary from 1-1/2 inches (3.8 cm) to 3 inches (7.6 cm). Installation usually requires the use of a special wrench. The type of hanger screw required depends on the application. For example, table legs and chair legs must be firmly fixed to the table, and a fully threaded screw is required, so there is no gap. Such a project requires a larger and thicker hanger screw to support the weight of the table top, or the weight of a chair, or an adult.

In addition to the legs of tables and chairs, they are used for various other purposes. They can be used to build armrests, connect the armrest of a chair to the chair base, or fix the armrest to the door of a car. Any other application where the hardware for mounting two items is invisible is definitely a candidate for boom screws. If you have any questions, you can consult me ​​at any time.

Post time: Aug-04-2021