Bolts & Bolt Manufacturers

Industrial bolts are a type of fastener that bind industrial material in a variety of ways. They are fabricated from rods, with the addition of a top portion, called the head and and helical threads around the outside, called the ridge. Bolts are fastened using tools like allen wrenches, high pressure drills and handheld screwdrivers. These popular fasteners are used in nearly every industry in the working world, especially in automotive manufacturing and building construction (both commercial and at-home). Aircraft and military industries use them as well, but because of the serious and sensitive nature of the applications, they have specific bolt standards requiring special anti-corrosive materials and coatings and rigorous testing.

Bolts are divided and classified by bolt manufacturers per the major diameter of their external thread, their pitch measurement and their head type. The ridge is also called a crest, and the space between the ridges is called the root. Threads either slope upwards to the right or upwards to the left. When measured, this slope is called the helix angle. Engineers also measure an a V-shaped angle between the crest, called a thread angle. Pitch, which is the distance between separate thread crests, is measured along the thread axis with a thread pitch gauge. Head classification is based on shape and size. Examples include: flat heads, round heads, pan heads, oval heads, taper heads, binding heads and truss heads.

Some Leading Manufacturers

Hercules Fasteners

Brook Park, OH | 800-332-7320

Here at Hercules Fasteners we are an ISO-certified fastener supplier with experiences dating back to 1985. We put product quality at a very high priority and these long lasting solutions will last you for many years to come. You can count on us to supply you with the very best. Please give us a call today to learn more information.

AJ Fasteners Inc.

Anaheim, CA | 714-630-1556

At AJ Fasteners, we work hard to make your fastener purchasing experience simple. We make communication simple. We make researching simple. We make shopping simple. And we make saving simple. We manufacture and supply a multitude of bolts and fastening solutions, including bolts, screws, nuts, pins, rivets, sockets, washers, and more. These products are also offered in a huge range of materials, so we can provide a solution that meets your specifications. Connect with us to discover how we can serve you!

Ford Fasteners, Inc.

Hackensack, NJ | 800-736-5014

For over 40 years we have been providing outstanding bolts at a very fair price. Here at Ford Fasteners we are a turnkey supplier and we specialize in creating self tapping, self drilling, self sealing and self piercing screws. We will always keep your production goals in mind which is why we will work with you every step of the way. Contact us for more information!

Ken Forging

Jefferson, OH | 888-536-3674

We are continuously looking for ways to provide the best bolts on the market. We are proud to say that are a family-owned business with over 44 years of experience. We are committed to manufacturing the highest quality solutions and you can trust Ken Forging, Inc. to meet all of your needs. All of our bolts are affordable and designed for a number of applications. Please call us today!

Eastwood Manufacturing

Houston, TX | 281-447-0081

Eastwood Manufacturing is your single source for industrial bolts and fasteners. We have experience manufacturing all kinds of standards parts, but custom fasteners are our true specialty. We can create custom bolts to satisfy your requirements for unusual sizes or nonstandard configurations. As an industry leader, we respond quickly and positively with truly high quality, precise solutions! Get in touch with our fastener specialists today!

Coburn-Myers Fastening Systems Incorporated

Trainer, PA | 800-662-7459

We are an experienced supplier of all kinds of fastening and hardware solutions, including bolts, nuts, washers, anchors, screws, studs, pins, and more. We stock both standard and metric sizes, and we also provide our customers with a host of specialty fasteners as well. Whatever your fastening needs may be, we have a solution for you! Check out our online store and give us a call to find your fastening solution today!


Furthermore, there are many bolt varieties, generally named for their shapes, sizes or uses. Such bolts include expansion bolts, lag bolts, hex bolts, anchor bolts, J bolts, U bolts, stud bolts, eye bolts and shoulder bolts. Expansion bolts have a taper head, lead sleeve, metal cone and nut. They’re used with flooring and seating at auditoriums, stadiums, classrooms, theatres and the like. They get their name from their attachments, which expand as the bolt is driven into a surface. Lag bolts are made of wood and are usually used with wooden beams or posts. They either have a square or hexagonal head. Hex bolts, named after their six-sided, hexagonal head and usually made of metal, are one of the most common bolts around. Anchor bolts anchor supports like columns or traffic sign poles to a foundation. J bolts are simply named for their shape, which looks like the letter “J.” In the same way, U bolts, bent with threads at both ends, look like a “U.” Next, stud bolts are round metals bars that are either completely covered or covered at both ends with screw threads. Eye bolts, are threaded at one end and have a circular eye at the other end instead of a head. Finally, shoulder bolts have pivot mounting shafts that are not threaded all the way up, but rather stop before the head. This leaves a smooth-sided shaft that is slightly wider than the threaded area, which is where “shoulder” reference originates. Shoulder bolts, usually made from stainless steel, can be round or square.

To get the perfect industrial bolt for your application, discuss requirements with your manufacturer. Standard industrial bolts are made from from strong metal like titanium, aluminum or stainless steel. To make a bolt, manufacturers first select one of these metals in the form of a wire rod, and then heat in a furnace for 30 hours and bathe in sulfuric acid to remove any potential rust particles. After this, to prevent any rust from coming back, manufacturers coat the rod in a phosphate that also functions as a lubricant. The next step is to shape the rod. This is accomplished with cold forging, a process that uses high pressure, room temperature heat and round rod-shaped dies. After forcing it through the dies, the newly shaped rod is cut into shorter pieces and sent through another die, which shapes the head. Threads are cut into the piece via a cold forging method that uses high pressure rollers to press the thread pattern into the bolt. While most American manufacturers have traditionally measured bolts using the American Measuring System, as of late, metric bolts have gained usage to accommodate international business.

Hercules Fasteners

Industrial boltBolts – Hercules Fasteners