Grade 8.8 Oval Neck Bolt

Fishtail bolts, also known as oval neck bolts, are extensively utilized in various industries due to their convenience and affordability. These bolts find significant application in track laying within the metallurgical industry, coking industry, and iron and steel industry, specifically to secure the connection between rails and rail joints. Manufacturers can produce high-strength fishtail bolts by utilizing low carbon alloy steel or medium carbon steel and subjecting them to heat treatment. Alternatively, mild steel fishtail bolts or stainless steel oval neck bolts can be used.

High-strength bolts are composed of screws, nuts, and washers made from high-strength steel materials such as 45# steel, 35K, and 35CrMo. On the other hand, mild carbon steel oval neck bolts are usually manufactured using Q235 and 08All steel. When it comes to track bolts, the most common grades utilized are 8.8, 9.8, and 10.9. Meanwhile, our oval neck bolts are graded at 8.8, and we're capable of producing over 600 tons each month.

The high-strength fishtail bolt connection is a promising method for various reasons. Firstly, it is straightforward to construct and has excellent mechanical performance. Additionally, it can be easily disassembled and replaced, making it a practical choice. The connection is also highly resistant to fatigue and will not loosen under dynamic load, making it a reliable option. Overall, these advantages make the high-strength fishtail bolt connection an attractive choice for many applications.

Oval neck bolts find limited application but are primarily employed to secure track joint splints (fishplates) and grooved pipe fittings, providing a stable connection.

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