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What Is a Threaded Rod?

Threaded rods tend to look like screws or bolts, but without heads or washers.
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  • Written By: B. Turner
  • Edited By: W. Everett
  • Last Modified Date: 05 October 2014
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A threaded rod is a type of metal fastener with threads cut into both ends. These rods resemble the shank of a screw, yet tend to be longer and thicker than a standard screw. Threaded rods do not have heads or washers like those found on a screw on bolt, and tend to be the same diameter along their entire length. Depending on the model, a threaded rod may feature threads along the entire length, or simply at either end. This product is sometimes known as all-thread, and can also be referred to simply as a stud.

These fasteners can be used to join wood or metal together, acting as a pin to connect the two materials. They are often inserted into concrete or wood during a repair, and can be used to stabilize structures ranging from wooden furniture to concrete walls. Builders and contractors may also use a threaded rod when constructing homes or other types of buildings. These threaded studs are also popular with metalworkers when building furniture or consumer goods.

A thread rod also serves as a popular method of hanging sheet metal ducts and other equipment within a building. Installers attach one end of the rod to the ceiling structure, then thread the other end into a special fastener or clip. These clips or fasteners can then be used to hang ductwork, light fixtures, or mechanical equipment.

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When choosing threaded rod, buyers must consider a number of factors to select the right product for the job. One of the most important decisions is the type of material each rod is made from. Standard steel or aluminum rods represent the most popular options, with stainless steel varieties generally reserved for outdoor applications or corrosive environments. High-strength rods may be needed to support heavy loads, and brass or zinc studs may be used to enhance visual appeal on certain types of projects.

Buyers must also consider the length and diameter of each threaded rod. These rods can generally be cut to size using a grinder or saw, but it's often easier to choose the correct length from the beginning. Users must also consider the type of threading on each rod. Courser threading may be required for heavy-duty projects, while finer threads may be needed in more delicate materials or small projects. The ends of each rod may be chamfered or coned to meet the needs of different applications.

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