Bolts/

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. Lag bolts are generally large, heavy duty and often industrial bolts, though smaller variations are available for use in furniture and cabinetry industries.

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Elgin Fastener Group
Versailles, IN
812-689-8917
The Elgin Group is a leading importer and metal manufacturer & finisher and is more than capable to deliver you the right lag bolts for your application. Please call Elgin's experienced and friendly personnel with any questions you may have or send for the highly helpful EFG literature that includes company profiles for each of its divisions, along with contact info for each company!
 
Ford Fasteners, Inc.
Hackensack, NJ
800-272-3673
Quality lag bolts is just one of many reasons to choose Ford Fastener as your go-to supplier for all manner of necessities. Ford's expansive inventory of products is available for immediate delivery nationwide. Celebrating its 42nd year in the business, Ford is committed to continued quality service and would love to deliver you with the solutions you want.
 
Hercules Fasteners
Brook Park, OH
800-332-7320
Hercules Fasteners' staff has been supplying customers with the right bolt solutions since 1985 and takes pride in providing quality lag bolts at competitive pricing and with exceptional customer service and prompt, hassle-free delivery. Their ISO-certified distribution business is unparalleled in customer service and product quality, so be smart and choose Hercules.
 
Superbolt®, Inc.
Carnegie, PA
800-345-2658
All over the world, Superbolt's precision crafted lag bolts have been used for keeping things tight and together in all manners of applications. Superbolt's experienced workers have tackled the toughest problems and their services have proven themselves again and again. To find out how so many customers have solved their fastening problems, please contact Superbolt today.
 
Stalcop
Thorntown, IN
765-436-7926
By combining cold forming with various secondary processes, Stalcop can manufacture lag bolts to perfection, providing customers like you with a solution you can believe in. Stalcop's products and services are consistent, timely and priced competitively. Please call Stalcop's excellent supportive personnel today with any questions you may have or visit their helpful website.
 
C&L Rivet Company, Inc.
Hatboro, PA
215-672-1113
C&L Rivet Co. has been providing a wide range of customers with quality assurance since 1960. In 2001, C&L acquired P. F., Inc.- the combination of these companies provides enhanced versatility, knowledge, quality, competitive pricing, service & distribution of additional products including lag bolts unmatched in the industry. For full product descriptions, please check out C&L's website!
 
Contorq Components
New Britain, CT
860-225-3366
Contorq is among the finest metal working companies in the world today. We specialize in metal stamping, deep drawing and cold heading offering customers quality t-nuts, specialty and standard fasteners made in the USA. Manufacturing to rigorous quality standards is our specialty. No matter the application, automotive to garments, when you require the best, Contorq is your fasteners source.
 
Crouch Sales Co., Inc.
Dallas, TX
866-419-0300
Since 1966, a family owned fasteners distributor of Bolts, Anchors, Nuts, Screws & other fastener products. Customers nationwide can shop & buy online! Experience "Service First" at Crouch Sales. Our expert sales staff is ready to assist phone, fax, online or walk-in orders. Let us earn your repeat business by offering customized solutions from our extensive inventory & quantity discount pricing!
 
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Industry Information

Lag Bolts

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. 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.