The Ultimate Guide To Flush Head Screw Tightening

Fish bolts and fishplates are used in the metallurgical, coking, and steel industries, as well as in rail laying and rail joint connections. When tightening fish bolts, it is important to follow a specific order. For example, with a four-hole fishplate, the middle two bolts should be tightened first, followed by the bolts on both sides, and then the middle two bolts should be tightened again. Fish Heads are replacement heads for fish tapes that can be easily installed by clipping off the end of the tape, sliding on the Fish Head, and tightening the Allen screw with a wrench.

Fish bolt tightening in rail joints

Fish bolts are used to connect rail ends with the help of rail joints, also known as fishplates. Each rail joint requires a minimum of two fish bolts, and the bolts should be of the proper size and placed in the correct location.

The fish bolt, fishplate, and their contact points should be oiled. When screwing in the bolts, the nuts should be staggered inside and outside. When tightening the bolts, it is important to follow a specific order. For example, with a four-hole fishplate, the middle two bolts should be tightened first, followed by the bolts on both sides, and then the middle two bolts should be tightened again. A 55cm screwdriver or two wrenches can be used for tightening.

Fish bolts can be replaced with hexagonal bolts in some cases. They come in various types, such as the BHON fish bolt, Cup Head Oval Neck Fish Bolt, Heavy Hex Head Frog Bolts, Anchor Bolt, and Tunnel Bolt. The size of the fish bolt varies depending on the rails or fishplate being used.

The proper tightening of fish bolts is crucial to ensure the safe and efficient operation of the railway system.

Fish bolt tightening in the metallurgical industry

Fish bolts are used to fix rail joints in the rail laying and ballasting of the metallurgical industry. They are also used in the coking industry, steel industry, and rail joint connections. The process of tightening fish bolts involves several steps to ensure a secure connection.

Firstly, it is important to note that the fish bolt, fishplate, and their contact points need to be oiled before tightening. This helps ensure a smooth process and protects against corrosion. When tightening the bolts, it is important to stagger the nuts inside and outside the fishplate. The order of tightening also matters; for a four-hole fishplate, start by tightening the middle two bolts, then move to the sides, and finally return to the middle two bolts for a final tightening.

The tools required for this process are a 55cm screwdriver or two wrenches. If the fish bolt needs to be removed, a hammer should be used to gently tap the ends of the fishplate, ensuring that the eyes are aimed at the correct position.

Fish bolts are essential in creating a safe and stable rail track system, as they provide the necessary strength and stability to withstand the pressure from vehicles. They are typically made of Q235 or 45# steel and come in various models, including Φ14×70, Φ16×75, Φ18×90, Φ20×90, Φ22×135, Φ24×135, Φ24×145, and Φ24×170.

Fish bolt tightening in the coking industry

Fish bolts are an essential component in the coking industry, playing a crucial role in ensuring the safety and stability of equipment. They are used to connect two rails together, providing the necessary clamping force to prevent the rails from moving or shifting under high pressure and stress.

In the coking industry, fish bolts help to secure rails in the rail joint connections. The process of tightening fish bolts involves several important steps. Firstly, it is necessary to oil the fish bolt, fishplate, and their contact places. When inserting the bolts, it is important to stagger the nuts inside and outside. The order of tightening the bolts also matters; for a four-hole fishplate, tighten the middle two bolts first, followed by the bolts on both sides, and then finally retighten the middle two bolts. A torque wrench is typically used to tighten fish bolts, ensuring they are properly secured.

The type of fish bolt used in the coking industry is also significant. Common types include square head, T-head, countersunk head, diamond neck, and hook fish bolts. Each type has unique features and advantages. For instance, square head fish bolts are easy to install and maintain, while T-head fish bolts offer a more secure connection and are less susceptible to rust and corrosion. Countersunk head fish bolts create a smooth and level surface, reducing the risk of damage to equipment, while diamond neck fish bolts provide a stronger connection and enhanced clamping force. Hook fish bolts offer a unique design for superior strength and a more stable connection.

It is important to select the appropriate type of fish bolt for a specific project, taking into account factors such as expected stresses, environmental conditions, and cost. By carefully choosing the right fish bolt and following the proper tightening procedures, the coking industry can ensure the safety and stability of their equipment, preventing accidents and equipment failures due to loose or improperly tightened bolts.

Fish bolt tightening in rail laying

Fish bolts are an essential component in rail laying, providing the clamping force needed to prevent rails from moving or shifting. They are used to fasten rail joint bars and steel rails together, ensuring the safety and stability of the railway system. Fish bolts are also known as fishtail bolts and are used to fix rail fish plates onto steel rails.

There are several types of fish bolts used in rail laying, each with unique features and advantages. The most common types include square head, T-head, countersunk head, diamond neck, and hook fish bolts. The choice of bolt depends on the specific requirements of the rail project, such as expected stresses and environmental conditions.

When tightening fish bolts, it is important to follow the correct order. For example, with a four-hole fish plate, the middle two bolts should be tightened first, followed by the bolts on both sides, and then the middle two bolts are tightened again. Additionally, when screwing in fishtail bolts, a 55cm screwdriver or two wrenches should be used.

The installation process for fish bolts involves drilling holes into the rails, inserting the bolts, and tightening them with a torque wrench. The bolts and nuts should be staggered inside and outside, and the contact places of the fish bolts, fishplates, and their connection points should be oiled.

Fish bolts are typically made from ordinary carbon steel, high-strength carbon steel, or alloy steel. They are manufactured through friction press molding, with a 50mm long buckle, and can also be formed through cold heading.

Fish Head replacement for tightening

Fish Heads are replacement heads for your Fish Tape. They are unlike any other replacement head on the market. If you have a set of side cutters, you can have your broken tape back in action in just a few seconds.

To replace your Fish Tape's tip with a Fish Head, simply clip off the end of your tape, slide on the Fish Head, and tighten the Allen Screw with the supplied wrench. There is no need for heating, bending, or twisting; just snip, slip, tighten, and go.

The Fish Head is rounded, making it easier to move through the conduit. It is also tapered, reducing the chance of snagging when you start pulling. If it does become snagged, don't worry—the Fish Head is stout and has been tested to hold over 500 lbs of load.

When tightening a fishplate and fish bolt, it is important to note that the fish bolt, fishplate, and their contact place need to be oiled. Additionally, when tightening the nuts, they should be staggered inside and outside. For a four-hole fishplate, tighten the middle two bolts first, then the sides, and then the middle two again.

Frequently asked questions