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Expansion Bolts

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

Materials such as concrete and brick are easily damaged by threaded screws and bolts as the treads strip the material rather than biting into it. Read More…

Expansion Bolts Expansion bolts are multi-component fasteners that expand upon installation to provide secure fastening in materials that do not permit reliable thread formation as is needed for other types of bolts.
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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. $$$

Cleveland, OH  |  800-437-1689

Buckeye Fasteners is an ISO 9001:2000 certified leading supplier of custom industrial bolts and nuts. We have weld pins, screws, nuts, levelers and special-purpose parts such as low-carbon BF brackets, ES screws and inserts. Our facility has complete custom manufacturing capabilities, and we see our products through from deisgn to shipping. For a more in-depth look at our products and capabilities, contact us and speak with a Buckeye representative today!

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Buckeye Fasteners, Inc. $$$

Muskego, WI  |  800-785-2664

A distributor of industrial bolts, fasteners, screws and other nut and bolt products, Global Fasteners can secure such items as nut and bolt combinations, u bolts, anchor bolts, eye bolts, carriage bolts, lag bolts and other types. Our location provides an opportunity for national next-day shipping on products.

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Global Fastener & Supply, Inc. $$$
placeholder image Ford Fasteners, Inc. Ken Forging Southern Fasteners & Supply, Inc. Buckeye Fasteners, Inc. Global Fastener & Supply, Inc.

Instead of creating cracks and crevices as other bolts do, expansion bolts fill these deformities, which improves aesthetics as well as strengthening the connection. This allows the use of these bolts even in vibratory environments. This reliable anchor bolt can therefore be used in a wide variety of industries. Masonry walls, construction, turbines, motor couplings, gears, mining, seating and sign installation all use expansion bolts to avoid material damage while creating a firm bond.

This bond offers an extreme carrying weight. A relatively small bolt, ¼" for example, can have a pullout weight of up to 2,700 pounds. These carrying weights, measured in tonnage, provide the rating system for expansion bolt manufacturers and suppliers. Bolt length, diameter, materials and configuration should all be carefully considered with regards to the materials to be fastened. These materials should also be considered as poor quality concrete will crumble under such extreme weights no matter the type or class of bolt.

Each bolt system has three basic parts, the bolt, nut and sleeve, which may be assembled in a number of configurations. In the bolt-lead sleeve-tapered nut set up the entire mechanism is inserted into a pre-drilled hole and the tapered nut is drawn back towards the head to compress and expand the lead sleeve. The bolt-lead sleeve-metal cone-nut functions in the same manner though the metal cone is driven into the sleeve causing expansion rather than the nut. The tapered bolt-lead sleeve-metal cone-nut configuration is similar in assembly although the tapered bolt is responsible for expansion rather than the nut or the metal cone.

In any assemblage the bolt, nut and cone, if present, are made of steel alloys which offer strength and corrosion resistance. Cadmium and zinc plating are common finishes for bolts that may face continual exposure to water and other environmental elements. While each of these components is integral to the bolt design, the lead sleeve is the crucial element of the expansion bolt. Lead is a malleable substance. When compressed it easily fills the drilled spaces as well as any surrounding cracks or pores. This creates multiple points of attachment while minimizing the risk of cracking or shattering the anchoring material.

Expansion Bolt Informational Video