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Lag Bolts

A reliable source for Lag Bolts information and leading Lag Bolts 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.
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Leading Manufacturers

Fairfield, 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 $$$

Winston-Salem, NC  |  800-642-0921

From our inventory of over 130,000 different fasteners, we know precisely which ones are right for your application. We test them for material composition and measurement accuracy. With our Vendor Management Inventory service (VMI) our Service Technicians monitor your needs and keep you fully supplied at all times. Our ISO 9001 and AS9120B certifications helps us maintain system standards that ensure the fasteners we supply are the highest quality parts available.

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Southern Fasteners & Supply, Inc. $$$

Highland Park, IL  |  847-926-0722

G-Fast brings you precision components and fasteners that are designed for commercial and military applications. We specialize in precision machined components, special fasteners, cold-formed bolts, studs and shoulder screws, deep drawn parts, metal spinning, wire forming and a whole host of other services. We’ve been doing this since 1990 and would love to see you be our next customer!

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G-Fast Distribution, Inc. $$$

Elgin, IL  |  847-841-7000

We have the bolts that you can count on to keep your business moving along smoothly! Each of our products is put through testing to ensure quality, as well as being made of only the highest quality materials. We strive to uphold our reputation as one of the leading bolt manufacturers. Get in touch with our customer service representatives today!

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Engineered Components Company $$$

North Hollywood, CA  |  818-764-6467

FTC is regarded by many aerospace leaders as a preferred supplier of industrial fasteners. We make a variety of innovative standard & custom high-strength aerospace fasteners & captive fasteners, such as our Magic Groove™ fully retractable, structural captive screw. World class quality in record time.

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Fastener Technology Corp. $$$

Danboro, PA  |  800-237-4736

Here at PennEngineering, we are proud to say that our products are manufactured right here in the United States. We provide our customers with a variety of services including: wire forming, stamping, metal finishing, closed die forming, hot forging and open die cold forming. Our J bolts are quality-assured and require low maintenance. Contact one of our representatives to learn more information about our products.

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PennEngineering® $$$
placeholder image Ford Fasteners, Inc. Ken Forging Southern Fasteners & Supply, Inc. G-Fast Distribution, Inc. Engineered Components Company Fastener Technology Corp. PennEngineering®

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

 
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