The Reasons Why Fish Bolt May Crack

Fish bolt is one of widely used rail fasteners in connecting the steel rails together, and it is usually with fish plate in railway, which is also the reason why it is called fish bolt. If it is used improperly, it’s easy to crack during the application in railway. Now we will introduce why it may crack and what we need to attention during the processing of installation and application.

The Reasons Why Fish Bolt May Crack

1.Tightening torque is too large with uneven force when installing the fish bolt. Not choosing suitable torque wrench strictly matching the assembly, the workers may not familiar with the degree of tightening torque. They may think, the tighter the better, to the extent that it exceeds the yield limit of bolt material. So that fish bolt becomes to be out of shape. It is necessary to tighten the fish bolt according to the standard. The workers need to attention that suitable force may make the perfect effect, not the big strength, the better.

2. The flaws of the raw material, processing defects and problems in heat treatment may also cause the fracture of fish bolt.

Fish Bolt Specification

• Standards: GB, DIN, ISO, ANSI/ASTM, B7, BS, JIS etc
• Grade: 4.8, 6.8, 8.8, 10.9, 12.9
• Material: Q235, 45#, 40Cr, 20Mntib, stainless steel, etc
• Size: M12-M24 or upon customer request
• Length: 45mm-145mm or upon customer request
• Surface: Plain, black, zinc-plated, or according to customers' requirement
• Usage: It is used to fix the rail fish plates onto rails
• Non-standard OEM is available if the buyer provides a drawing or sample
• Samples: Samples are free

Fish bolt plays important role in ensuring the safety of rail track, therefore, it is necessary to choose high quality and good performance fish bolt. In addition, railway workers need to check and maintenance railway components regularly to ensure the safety of railway.