In Bridges and steel structures, the thickness of steel plates exceeds 40 mm and even reaches 60 mm. In this case, the holding length of the bolt is more than 10-15% of the thickness of the steel plate, and when the thickness of the steel plate is 50 mm, the holding length needs to be between 55-65 mm to ensure that the structure bears a huge load. In the connection of the bridge bracket, the material thickness should reach 80 mm, and the holding length of the bolt needs to reach 90 mm or more.

Standard bolt lengths chart

In the longer term, you need to check your wheel hub assemblies if you notice uneven or abnormal wear on your tires or brake components (rotors, pads, and discs). If you let a professional mechanic handle your tire rotations and brake maintenance, they should perform routine hub assembly checks while they do these tasks. If you like to handle your own maintenance, though, it’s especially important to make sure your bearings are in good working condition.

The length of the thread engagement should be at least 1.5 times the diameter of the bolt, and if the bolt is 10 mm in diameter, the length of the thread engagement should be at least 15 mm to ensure that the nut is fully integrated with the bolt. Insufficient meshing length may lead to loosening of the connection, reduced load, and even fracture.

For harder materials such as steel, the length of thread engagement can be relatively short. Bolts with a diameter of 12 mm are used in steel connections, and the screw mesh length can be designed to be about 18 mm, enough to ensure the stability of the connection. For softer materials such as aluminum or plastic, the thread engagement length needs to be longer. For bolts with a diameter of 12 mm, for example, the screw engagement length of aluminum is recommended to be more than 24 mm to ensure that the thread can firmly bite into the material.

In the aviation industry, the aluminum alloy sheet of the aircraft fuselage is usually thin, about 2-5 mm in thickness. In order to connect two such aluminum alloy sheets, the holding length of the bolts is selected from 6-8 mm to provide sufficient holding force. If the steel plate thickness for heavy equipment is up to 30 mm, the bolt holding length needs to be at least 35-40 mm to provide sufficient strength protection.

The price of conventional carbon steel hexagonal head bolts is relatively low, and the unit price of carbon steel bolts with a diameter of 16 mm and a length of 50 mm on the market is about 1.5 yuan. The price of 10.9 high-strength bolts is 2-3 times that of ordinary carbon steel bolts, and the unit price may reach 3.5-4 yuan. A stainless steel bolt with a diameter of 12 mm and a length of 100 mm costs about 8-10 yuan, but its service life is often more than 3 times that of carbon steel bolts.

Grip lengthbolt

In bridge and steel structure engineering, high strength bolts with a diameter of 20 mm need 30 mm or more thread engagement lengths to withstand the weight and external stresses of the building. According to engineering design specifications, if the thread mesh is insufficient, it will not only reduce the safety of the structure, but also may lead to the failure of the entire project. Assuming that a steel beam’s connection points need to withstand 50 tons of force, and the design thread engagement length is only 20 mm, it can lead to a 15% reduction in bearing capacity, increasing the risk of structural collapse.

Stainless steel bolts are widely used in environments that require corrosion protection, such as Marine engineering and chemical plants. The corrosion resistance of 304 stainless steel bolts is much higher than that of carbon steel bolts, which can maintain a long service life in the environment of high humidity and corrosive gases, and its tensile strength is usually 500-700 mpa, although it is slightly lower than high-strength bolts, but in the environment of high salt spray concentration, it can provide better durability. 304 stainless steel bolts with a diameter of 12 mm and a length of 100 mm are selected for storage tank installation in chemical plants, which can be used for more than 20 years in highly corrosive environments.

The common drywall thickness is about 12 mm, if the drywall needs to be fixed on the wooden structure, the holding length of the bolt should be at least 12 mm, but in order to ensure a stronger fixation, you can choose 15-18 mm bolts. In some outdoor furniture installations, the thickness of the board is usually about 20 mm, and the holding length of the bolt should be 22-25 mm.

Grip lengthof bolt formula

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Boltlengthcalculator

Damaged wheel hub assemblies may fail catastrophically, causing you to lose control of your vehicle. This is a worst case scenario and few people suffer through it. A damaged assembly still impedes the proper functioning of your car, though! It can increase the wear and tear on other vital components including your brakes and tires. By reducing those parts’ effectiveness, a damaged wheel bearing can compromise your safety while you’re on the road.

There are a lot of different signs you may run into during day-to-day driving that can indicate a problem with one or more hub assembly on your car. Grinding, roaring, knocking, or popping sounds from your wheels can indicate a bad bearing. These can be constant or only noticeable when you turn; they’re usually not audible unless you’re moving faster than 30 MPH.

An industrial project requires the installation of 5,000 bolts, each with a diameter of 16 mm and a thread engagement length of 24 mm. If the screw mesh length is shortened to 20 mm, each bolt can save 0.3 yuan, and the overall saving is 1500 yuan. Insufficient thread mesh length can cause bolts to loosen or break, eventually requiring more parts to be replaced, and these maintenance costs can be as high as $5 per bolt replacement.

Different bolt types have different application scenarios and carrying capacity, and in the construction industry, common hexagonal head bolts are suitable for fixed points that require large torque. With a diameter of 16 mm and a length of 50 mm, the hexagonal head bolt can withstand a tensile force of more than 10,000 Newtons, which is very suitable for large projects such as Bridges and steel structures. In some lightweight applications such as wood bolts used in furniture assembly, the diameter is generally 6-8 mm and the length is 30-40 mm, which can provide enough fixing force, but its carrying capacity is significantly lower than that of industrial bolts.

Grip lengthchart

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The correct grip length of a bolt is typically determined by the combined thickness of the materials being fastened. For example, if fastening two steel plates of 8 mm and 12 mm, the bolt’s grip length should be at least 20 mm, with a preferred range of 22-25 mm for secure fastening.

When you discover a damaged wheel hub assembly, make sure it’s replaced with either OEM parts from your manufacturer or quality aftermarket replacement parts like WJB’s that meet the same standards. Making sure your vehicle is running on healthy wheel hub assemblies is a vital part of keeping your vehicles – and you – safe on the road.

Expansion bolts are suitable for fixing concrete walls. They provide tightening force by expanding inside the walls. Expansion bolts with a diameter of 12 mm are capable of withstanding pulls of more than 5,000 Newtons and are widely used to install heavy equipment such as air conditioners and water heaters. Another common special bolt is a stud in a car engine, used to connect the cylinder block to the head. With a diameter of 10 mm and a length of 80 mm, the stud can withstand high temperatures and vibrations while maintaining good mechanical properties.

Grip lengthin inches

Choosing the right grip length can avoid the cost increase caused by excessive use of bolt length, such as 5 cm grip length bolt may be 20% more expensive than 3 cm bolt, so in some projects, the precise selection of the right length bolt can effectively control the budget. In a project that needs to install 1000 bolts, the average savings of 0.5 yuan per bolt can save 500 yuan for the entire project.

Grip lengthcalculator

High-strength bolts are mainly used in the need of high bearing capacity occasions, the steel structure of the building is often used in the connection of 10.9 high-strength bolts, its diameter can reach 20 mm, the maximum tensile strength of such bolts can reach 800 mpa, can withstand great tensile forces and shear forces, suitable for high-load environment connection. In the construction of some large Bridges, a single high-strength bolt can even withstand hundreds of tons of tension.

Boltgrip lengthChart

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Although modern wheel hub assemblies (also known as wheel bearings) are designed to last as long as your car, they’re subjected to such tremendous strain that hub damage is fairly common. Most drivers will have to deal with a damaged hub assembly at some point in their vehicle’s lifetime.

Some people said, a car is a collection of thousands of carefully-designed parts that are needed their attention to maintain with. When it comes to your wheel hub assemblies, you definitely need to muster your patience and go the extra mile to make sure they’re in good working condition; these components are vital in keeping your car safe and efficient.

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To fix the two steel plates together, the thickness of the first steel plate is 8 mm, the thickness of the second steel plate is 12 mm, and the total thickness is 20 mm. In this case, the holding length of the bolt should be at least 20 mm, and it is best to choose a bolt with a length of 22-25 mm to ensure sufficient fixing force. For some large construction projects, the steel thickness should reach 50 mm or more, and the bolt holding length needs to reach 60 mm or more to meet the greater load demand.

When the furniture is to install a wooden table, the diameter of the bolt is 8 mm, and the thread engagement length of at least 12 mm is required to ensure the stable use of the table for a long time. If the threads are not engaged enough, the table may loosen over time, ultimately affecting the service life.

Fortunately, a damaged hub assembly is easy to spot once you have your wheels jacked up off the ground. If at all possible, check your wheels two at a time – either both front wheels or both back ones. You can often spot a broken wheel bearing simply by comparing the behavior of two wheels after you spin them at the same time. If one of them shudders, slows down, or grinds to a stop before the other, it likely has a bad bearing.

To check individual wheel hub assemblies, you need to look for “play”. “Play” is any looseness in the wheel’s connection to the axle when it’s fully bolted down. You can check for play by grasping the wheel at its top and bottom, and pushing one side while pulling the other. You shouldn’t be able to wiggle the wheel to any significant degree this way; if you can, then the wheel has a dangerous amount of play.