FISH BOLT

A Fish Bolt is a specialized type of bolt used in railway track construction and maintenance, primarily to secure fish plates (also known as rail joint plates) to rail sections. These bolts play a critical role in ensuring the structural integrity and stability of railway tracks by holding rail joints firmly together.

Key Features of Fish Bolts:

1. Design:
   • Fish bolts typically have a cylindrical shape and feature a smooth shaft with a threaded end. This design allows for easy insertion and fastening to secure fish plates to the rail.
   • They are usually made of high-strength steel to withstand the heavy loads and dynamic forces experienced by railway tracks.
2. Dimensions:
   • Length: Fish bolts are available in various lengths, commonly ranging from 100 mm to 150 mm, depending on the application and the thickness of the fish plate and rail.
   • Diameter: The diameter of fish bolts typically ranges from 16 mm to 22 mm, but specific dimensions may vary based on the rail and joint plate specifications.
3. Usage:
   • Fish bolts are primarily used to fasten fish plates to the ends of rail sections, creating a secure joint that allows for smooth train operations.
   • They are also used in conjunction with nuts and washers, which help distribute the load and secure the bolt in place.
4. Types:
   • Fish bolts may come in different types, including:
     • Standard Fish Bolts: Basic design for general use.
     • High-Strength Fish Bolts: Enhanced materials and design for applications with higher load requirements.
     • Corrosion-Resistant Fish Bolts: Treated or coated to withstand harsh environmental conditions.
5. Installation:
   • Installation of fish bolts typically involves drilling holes through the fish plate and rail ends, inserting the bolts, and securing them with nuts and washers.
   • Proper torque specifications must be followed to ensure the bolts are tightened adequately without risking damage to the rail or joint.