Lag Bolts

A reliable source for Industrial Bolt information and leading Industrial Bolt Companies & Manufacturers.

Lag bolts are generally large, heavy duty and often industrial bolts, though smaller variations are available for use in furniture and cabinetry industries. Popular in construction, masonry, locomotive, mining and civil engineering industries lag bolts are used as fasteners at integral joints of such structures as bridges, railway trestles, decking and even barn construction. Read More…

Lag Bolts A lag bolt is a mechanical fastener with a threaded body that is driven through two adjacent surfaces for the purpose of adjoining them securely. Also known as a lag screw, this piece of hardware is most often used to link wooden elements with other wooden parts or concrete foundations.

Leading Manufacturers

Hackensack, NJ  |  800-272-3673

Our company has a reputation for superior products, customer service, and dependability. All our fastener products are built to last, and we know that our customers appreciate our dedication to using the best materials and manufacturing techniques. If you would like to learn more about us, contact us by phone or email, or stop by our website today!

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Ford Fasteners, Inc. $$$

Jefferson, OH  |  888-536-3674

Our company has manufacturing experiences dating back to 1970 and over the years we have grown into an international supplier of bolts.

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Ken Forging $$$

Roseville, MI  |  800-755-8959

Our stainless steel fasteners are hard to beat! When you do your business with us we will treat you with the best customer service possible. It is our wish that we leave you with an experience so wonderful that you want to tell all of your friends. Our stainless steel fasteners will be able to stand up to the rigorous demands of everyday applications. For more information or to get your questions and concerns answered send an email to our representatives today!

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All State Fastener Corporation $$$

Lincolnshire, IL  |  800-323-7367

Since 1968, we have offered the finest fasteners. At XL Screw Corporation we feature over 9,000 items, with 600 new items added in 2009. “Quality First” is the standard by which we live. We offer metric fasteners, plastic fasteners, stainless steel fasteners and screws. We offer customers a reputation built upon quality & services, competitive pricing, proven managed inventory programs and more.

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XL Screw Corporation $$$

Wallington, NJ  |  973-472-2300

Since 1986, Aerospace Manufacturing has been a leading hot heading specialist and licensed manufacturer of aircraft fasteners such as industrial bolts, titanium bolts, studs and fasteners. QSLM approved for NSN 5306 bolt manufacturing. We are ISO certified, and our customers are aerospace industry world leaders. Contact us today for more information about who we are and what we do.

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Aerospace Manufacturing Corporation $$$

Goodyear, AZ  |  623-925-5998

At Parker Fasteners we take great pride in our work, and we make it our goal to exceed your expectations. We want to be your partner, providing quality parts and solutions cost effectively and all from American sources. We even cold head challenging materials, so we can solve your toughest fastening problems. For all your socket drive fastening needs be sure to give us a call or check out our website to see how we can make a difference in your production!

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Parker Fasteners $$$
placeholder image Ford Fasteners, Inc. Ken Forging All State Fastener Corporation XL Screw Corporation Aerospace Manufacturing Corporation Parker Fasteners

Wooden components such as posts and beams are commonly connected with these devices as they offer an extremely secure connection without causing significant damage to the woodwork. To ensure a continually high degree of clamping force when tightened, lag bolts are made of strong materials that are not likely to stretch, expand or crack over time. The specific material depends on the intended use and environmental pressures to be inflicted upon the bolt. Zinc-plated steel and hot dipped galvanized steel are popular choices as they are low cost and still offer some resistance to rust. Stainless steel and silicone bronze, however, offer heightened protection against the elements as they are highly resistant to corrosion from moisture and chemicals that may be present in some industrial settings.

The manufacturing process used to create lag bolts is similar to that of other bolt types. A steel or bronze wire rod is first heated consistently for an extended period of time and all rust particles are removed. If needed, the metal is coated for added protection. Cold forging is then used to shape the rod at room temperature and the rod is forced through dyes at a high pressure to be shaped into long perfectly round rods. Once cut down to the desired length, a second dye shapes the head of the lag bolt which may be either square or hexagonal.

Cold forging using high pressure rollers is then used to press in the thread pattern. The finished course-pitched lag bolt is then ready for use in a variety of applications. A pilot hole is made in the first piece of wood or other material and the bolt is inserted. A wrench, spanner or pliers are then used to drive the screw into the second bit of material. The threading bites into the wood to hold the two components together.

During installation, caution must be used so as not to damage the head of the screw. The head provides compression while preventing the bolt from being driven completely through both materials. In some instances a washer is also used to protect softer lumbar, ensuring that the head will not sink into the wood. It is important to consider the materials to be fastened as well as the strength and corrosion resistance required of the bolt materials. Other considerations include the bolt length and diameter.

Lag Bolt Informational Video