Bolts & Bolt Manufacturers
Bolts are inserted into industrial material in multiple ways. Bolts can be engaged with the use of handheld screwdrivers, high pressure drills and allen wrenches. The nut, which attaches to the end of the shank, is almost always hexagonal in shape. The military and aircraft industries have specific bolt standards that require special anti-corrosive coatings and materials. These bolts are tested under more rigorous conditions, and therefore, are the preferred standard of the respective industries. Bolts are used in nearly every industry, specifically in building construction and automotive manufacturing. In the United States, most bolts are measured by the American Measuring System. However, Europe and Asia use the Metric System. Recently, metric bolts have become more popular in the United States because of international businesses that need parts that are compatible with products from other countries. Bolts come in many different sizes, shapes and materials. Anchor bolts, J bolts, stud bolts, expansion bolts, lag bolts, U bolts, eye bolts, hex bolts and shoulder bolts all have different specific uses and defining shapes and are commonly found in warehouse stock inventory.
The manufacturing process to create standard metal bolts out of stainless steel, titanium or aluminum takes many steps. Stainless steel is often chosen for the manufacturing of bolts because of its strength. First, a steel wire rod is heated in a furnace for 30 hours and bathed in sulfuric acid to remove any rust particles. It is also coated with phosphate that prevents rusting and acts as a lubricant. The rods are then formed by cold forging, where the rod is shaped at room temperature using high pressure. It is forced through dyes and shaped into long, perfectly round rods. After they are cut into shorter pieces, the rods go through a dye that shapes a head on one end. The threading on the other end is done by another cold forging method using high pressure rollers that press in the thread pattern.
Some Leading Manufacturers
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.
Harrison Twp., MI | 800-568-3454
We are a leading supplier of a wide range of bolts, fasteners, nuts, rivets, screws, washers, and many other fastener hardware products. Our diverse stock of fastener solutions provides both standard and metric sizes, and we offer several material options, including stainless steel and brass. Check out our website and feel free to give one of our representatives a call to find your fastener solution today!
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!
Carnegie, PA | 412-279-1149
It is our mission to manufacture top of the line bolts for a number of industries including: construction, forging, manufacturing, oil & gas, forestry & agriculture, mining & quarrying, power generation, shipbuilding, transportation and more. We are a proven supplier and all of our products are extensive to ensure maximum performance. If you have any questions then please give us a call today!
Bolt manufacturers designate bolts by the major diameter of the external thread and the pitch measurement. A thread is a ridge that wraps around the outside of a cylinder in a helical pattern. The ridge itself is called the crest, while the space between the ridges is called the root. Threads are set at an angle to the axis of the bolt and slope either upward to the right (for right-hand threaded screws) or upward to the left (for left-handed threaded screws). The slope of the thread is known as the helix angle. The thread forms a V-shaped angle between the crest, called the thread angle, which is determined by fastener engineers. The distance from one crest of one thread to another crest is called the pitch and is measured along the axis of the thread with a thread pitch gauge. Bolts are further classified by bolt manufacturers according to the type of the top portion, called the head. The head comes in a variety of shapes and styles. Flat heads are used where finished surfaces require a flush face. Round heads were commonly used in the past, but are now being replaced by newer designs, such as pan heads. Oval heads require the hole to be countersunk. Binding heads are undercut, bound and eliminate the fraying of stranded wire in electrical and radio work. Truss heads, also known as oven, stove or oval binding heads, are used to cover large diameter clearance holes in sheet metal.
Anchor bolts are generally embedded in concrete and used to anchor columns or other supports to a foundation or for construction and in securing traffic signal poles. U bolts are named for their shape-they are bent bolts with threads at both ends. They may be round, square or semi-round and used when suspended items need to be attached to the surface of something. U bolts are common in the construction and automotive industries. Eye bolts are threaded at one end and have a circular eye at the other, instead of a head. The eye is used to guide a cable, rope or chain for lifting purposes. Eye bolts are common in aircraft construction. J bolts are also named for their shape, a letter J, or half of a U bolt. They are used as cast-in-place anchor bolts and often made of steel or titanium. Stud bolts are round metal bars with screw threads at both ends or on the whole thing. Expansion bolts consist of a taper-headed bolt, lead sleeve, metal cone and a nut. They are used to secure theatre, auditorium, stadium and classroom seating to the floor. They have attachments that expand as the bolt is driven into a surface. Lag bolts are heavy woodscrews that have a hexagonal or square head and are usually driven into wooden beams or posts by a wrench. Hex bolts are very common and usually made of metal and used with a washer. They are named for the six sides on the bolt head. Finally, shoulder bolts pivot mounting shafts that are not threaded all the way up-it stops before the head, leaving a smooth-sided shaft that is usually a little wider than the threaded part. They can be square or round and are generally made out of stainless steel.