Square Head Fishbolt For Railway Fastening System , Grade 8.8 10.9 Rail Joint Bolt

Fishbolt (also known as fish tail bolt, rail joint bolt) is a critical fastener designed exclusively for railway track systems. It secures fishplates (joint bars) to connect two rail sections, ensuring stable, safe, and durable rail joints under heavy train loads and vibrations.

Manufactured via hot forging + heat treatment, our fishbolts deliver exceptional tensile strength, vibration resistance, and corrosion protection. Ideal for mainline railways, industrial tracks, mining rails, and metro systems.

• Grade 8.8/10.9 high-strength steel (40Cr/45#), tensile strength ≥830MPa (8.8) / ≥1040MPa (10.9)
• Withstands extreme vibration, shear force, and dynamic loads from heavy-haul trains

• Oval neck / round head anti-rotation design locks into fishplate holes, preventing spinning during tightening
• Matched with spring washer + heavy nut for dual anti-loosening, reducing maintenance frequency

• Surface treatment: hot-dip galvanized (HDG), black oxide, electro-galvanized, or Dacromet
• Salt spray test ≥500 hours, suitable for coastal, humid, and harsh industrial environments

• Strictly comply with GB, DIN, ISO, AREMA, BS, UIC standards
• Thread precision: 8g (bolt) / 7H (nut), smooth engagement with fishplates and rails

• Hot-forged & quenched-tempered for excellent toughness and fatigue resistance
• 3-5 times longer service life than ordinary bolts, lowering total project cost

• Fits 38kg, 43kg, 50kg, 60kg, 75kg rails and all standard fishplates
• Custom sizes (M16-M24, length 70-170mm), materials, and coatings available

• 15+ years of railway fastener manufacturing experience, ISO 9001 certified
• 3 production lines, monthly capacity 3,000+ tons, fast delivery (15-25 days)

• 100% inspection for material composition, mechanical properties, dimensional accuracy, and surface finish
• Test reports available: SGS, TUV, CE

• No middlemen, direct factory price. Bulk discount for large orders

• Free samples provided
• OEM/ODM support: custom drawings, logos, and packaging
• Professional technical team offers installation guidance

Fishbolt connects two rail sections via fishplates (joint bars), ensuring a smooth, safe rail joint. It's the core fastener for railway tracks, industrial rails, and mining lines.

Grade 10.9 (40Cr) has higher tensile strength (≥1040MPa) and is for heavy-haul mainlines. Grade 8.8 (45#) is for standard railways and industrial tracks.

Yes. We customize size, material, strength grade, surface treatment, and packaging per your drawings or samples.

1-year quality warranty. Replacements for quality issues at our cost.

Yes. Free samples (1-5 pcs) available; buyer covers shipping cost.