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Rail Fish Bolt
Product Overview Rail fish bolts (also called joint bolts or fishplate bolts) are specialized fasteners used to connect rail joints by securing fishplates (joint bars) to the rail ends. They are critical for maintaining track alignment, electrical continuity, and structural integrity at rail...
Features
Rail fish bolts (also called joint bolts or fishplate bolts) are specialized fasteners used to connect rail joints by securing fishplates (joint bars) to the rail ends. They are critical for maintaining track alignment, electrical continuity, and structural integrity at rail joints.
Professional team
7x24 hours delivery
FEATURE 01
High Tensile Strength – Grade 8.8, 10.9, or 12.9 steel
FEATURE 02
Corrosion Resistance – Hot-dip galvanized (HDG), Dacromet, or stainless steel
FEATURE 03
Vibration Resistance – Spring washers or double-nut locking
Material & Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 8.8 | 800–1,000 | 640–800 | ≥12 |
| 10.9 | 1,040–1,200 | 940–1,040 | ≥9 |
| 12.9 | 1,220–1,400 | 1,100–1,220 | ≥8 |
Our factory & quipment
Dimensions & Torque Specifications
| Bolt Size (M) | Thread Pitch (mm) | Torque (Nm) (Grade 8.8) | Torque (Nm) (Grade 10.9) |
|---|---|---|---|
| M20 | 2.5 | 160–200 | 240–300 |
| M22 | 2.5 | 220–270 | 330–400 |
| M24 | 3.0 | 280–350 | 420–500 |
Note: Use lubricated threads for accurate torque application.
Installation & Maintenance
Installation Steps
Clean rail & fishplate holes (remove rust/debris).
Insert bolts with spring washers (if required).
Torque sequentially in a cross pattern (avoid uneven stress).
Maintenance Checks
Every 6 months: Inspect for loosening, corrosion, or cracks.
Annually: Verify torque & replace corroded bolts (>30% diameter loss).
Our Service Processes
Pre-sales Consultancy
1
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Confirmation of order
2
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Production
3
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Multi-Channel Shipping
4
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Confirmation of recei
5
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After-sale Services
6
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