Threaded rods and studs are the perfect fasteners when a project requires quick assembly and disassembly. They are used in a variety of applications, including plumbing, automotive, and electrical trades.

Rods and studs come fully threaded, which means the thread runs the entire length of the rod, or are double-ended, which means the ends are threaded but the center of the body is smooth. The thread can be right-handed, left-handed, or in the case of double-ended rods, it can be right-handed on one end and left-handed on the other. Fully threaded rods and studs are easy to cut to the desired length.

Double-ended rods and studs are available in equal and unequal lengths. With equal, there are an equal number of threads on each end. With unequal, there are more threads on one end. Unequal thread studs also have a self-locking version, which is suitable for a nut on one end and a tapped hole on the other. 

Another type of threaded rod and stud is the press-in captive stud. These are placed into punched or drilled holes and squeezed into place with a standard press. The head of the stud sits flush to the item’s surface.

Threaded rods and studs come in a variety of materials, from brass and steel to polyetheretherketone (PEEK.) Metal studs are more corrosion resistant, while PEEK rods resist high temperatures and chemicals. 

The last two considerations are stud size and thread style. The stud’s size name indicates the external diameter of the threaded portion of the stud, followed by the threads per inch for standard studs and millimeters per thread for metric studs. Standard studs are measured in inches and metric studs are measured in millimeters. Threads come in both coarse and fine. Coarse threads are sturdier and easier to thread and unthread, but fine threads are better for working with harder materials, and are stronger in tension than coarse threads.