Industrial Bolts banner

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.
Request for Quote

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!

Request A Quote

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.

Request A Quote

Ken Forging $$$

Houston, TX  |  713-230-2500

Since 1938 TSP Manufacturing has been a leading manufacturer of fasteners and bolts. We are committed to creating the highest quality products and exceeding all expectations of our customers. Since 1997 TSP Manufacturing has been ISO 9002 certified. TSP has a wide variety of materials that are used for fasteners and bolts including but not limited to stainless steel, pH grades, bronze, and plastics. Contact us today to learn how we can help supply your company.

Request A Quote

TSP Manufacturing $$$

Orange, CA  |  714-639-2040

With over 20 years experience in distributing specialty fasteners to the aerospace, commercial, military, construction, electronic and marine industries, you can count on Integrity Fasteners for all your fastener needs. We supply screws, metric fasteners, industrial fasteners and more.

Request A Quote

Integrity Fasteners, Inc. $$$

San Diego, CA  |  619-231-5966

We are a master distributor of virtually every type of bolt, screw, washer, and nut you can think of. We are your complete source, even doing custom manufacturing when unique specifications are required. This diversity provides our customers with a strategic advantage; certified quality, superior service, and fast delivery.

Request A Quote

Hayes Bolt & Supply $$$
placeholder image Ford Fasteners, Inc. Ken Forging TSP Manufacturing Integrity Fasteners, Inc. Hayes Bolt & Supply

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