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.

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. Our teams are committed to providing our customers with the best products possible and we offer quick turnaround on all orders. Here at Ken Forging we do not require any minimum orders and we can ship our stock bolts within 24 hours. Feel free to contact our representatives if you have any questions.

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Ken Forging $$$

Detroit, MI  |  800-521-2207

Wayne Bolt & Nut Co. delivers high-quality industrial, carriage, metric, stainless steel, titanium and other types of bolts to a wide range of industries and markets. We have over 50,000 sizes and styles of standard and special fasteners for you to choose from. Our quality products are approved by the major automotive manufacturers and when we’re audited we receive good to excellent ratings.

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Wayne Bolt & Nut Company $$$

Indianapolis, PA  |  317-472-9000

At Accurate Manufactured Products Group, our company’s focus is designing and manufacturing fasteners, production aids, and other measuring tool accessories that suit your needs. The stock items from our large inventory are shipped within 24 hours. Our team is made up of experts in custom manufacturing items quickly, at very competitive prices, with guaranteed customer satisfaction

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Accurate Manufactured Products Group, Inc. $$$

Macedonia, OH  |  330-468-3300

At SC Fastening Systems, it is our company's goal to be your number one source for your fastening needs. Our product line includes fasteners, bolts, sockets, threaded rod & studs, nuts, washers, screws, anchors, pins, and rivets. For more information about our capabilities, contact us today!

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SC Fastening Systems, LLC. $$$

Lawrenceville, GA  |  800-928-7439

Not only is O.E.M. Fastening Systems a full line fastener distributor but also a custom fastener manufacturer to your specs. We offer hex bolts, stainless steel fasteners and screws. We stock virtually every type of standard and semi-standard fastener to meet your fabrication, assembly & maintenance needs. Sentry can even manufacture custom fasteners to your print specifications. Contact us today!

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O.E.M. Fastening Systems $$$
placeholder image Ford Fasteners, Inc. Ken Forging Wayne Bolt & Nut Company Accurate Manufactured Products Group, Inc. SC Fastening Systems, LLC. O.E.M. Fastening Systems

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