Railway Track Bolts
Product: oval neck track bolts
Standard: ASME B 18.10 - 2006 AS 1085 GB/T 3098.1
Class: 8.8 10.9 12.9
Size: 1/2-1.1/8
Finish: HDG ZP etc
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Product Introduction
Product: oval neck track bolts
Standard: ASME B 18.10 - 2006 AS 1085 GB/T 3098.1
Class: 8.8 10.9 12.9
Size: 1/2-1.1/8
Finish: HDG ZP etc(customizable to regional railway standards)
Raw Material: Medium-carbon alloy steel (40Cr, 35CrMo, 42CrMo), quenched and tempered;corrosion-resistant alloy options for harsh environments
Surface Treatments: Hot-dip galvanizing (H.D.G), Dacromet, Geomet, black oxide, phosphated,zinc-nickel plating (high-corrosion resistance)
Specification Range: Metric: M16–M36; Inch: 5/8"–1 1/2" (full thread/partial thread; hex head/oval head/allen head designs)
Property Class: 8.8, 10.9, 12.9 (high-strength grades for dynamic load resistance)
Mechanical Properties
Key Features
Dynamic Load Resistance:
Heat-treated alloy steel construction delivers exceptional tensile
strength, yield strength, and fatigue resistance to withstand railway vibration, train impact, and
cyclic loads.
Corrosion & Weatherproof:
Advanced surface treatments (Dacromet, H.D.G) protect against
moisture, salt, and industrial pollutants-suitable for indoor, outdoor, and coastal railway lines.
Precision Fit:
High-precision thread rolling ensures tight engagement with nuts, preventing
loosening under continuous vibration; consistent dimensional tolerances for compatibility with standard railway fastener systems.
Specialized Designs:
Customizable head shapes (hex/oval/allen) and thread lengths to match sleeper types (concrete/wooden/steel) and rail assembly requirements
Application Fields
Designed exclusively for railway infrastructure and related equipment:
Rail track fastening (securing rails to sleepers/rail ties)
Railway bridges, tunnels, and viaduct structural connections
Switch and crossing systems (turnouts)
Railway rolling stock (locomotive and wagon component fastening)
High-speed rail, heavy-haul railway, and urban rail transit (metro, light rail)
Usage Precautions
Installation:
Use torque wrenches for controlled tightening per railway engineering standards; ensure proper alignment to avoid thread damage.
01
Compatibility:
Pair with high-strength nuts (e.g., EN 14399 Grade 8/10) and lock washers to enhance anti-loosening performance.
02
Environment:
For coastal or salt-laden areas, select Dacromet or zinc-nickel plating; conduct regular inspections for corrosion in harsh conditions.
03
Maintenance:
Periodically check for loosening, corrosion, or thread wear; replace bolts immediately if damage is detected to prevent track instability.
04
Taboos:
Do not reuse bolts after disassembly (fatigue risk); avoid mixing with non-railway-grade fasteners or different strength classes.
05
Markets & Logistics
- Main Markets: Global railway sectors (Europe, Asia-Pacific, North America, Middle East)
- Packaging: Anti-rust bags, cartons, palletized packaging, or steel drums; customized labeling for project-specific requirements.
- Order Flexibility: Supports bulk orders and custom specifications (length, head type, surface treatment); negotiable delivery terms to align with railway construction timelines.
Quality Assurance
Certifications:
ISO9001:2015, EN 14399, ASTM A490 compliance; meets international railway quality standards (e.g., UIC, AREMA).
Batch testing:
Tensile strength, yield strength, hardness, corrosion resistance, and fatigue life verification.
What's the difference with normal bolts ?
· Strength & Durability:
Track bolts use heat-treated medium-carbon alloy steel (e.g., 40Cr, 42CrMo) with high property classes (8.8–12.9), offering superior tensile/yield strength and fatigue resistance to withstand railway vibration, train impacts, and cyclic loads-far exceeding ordinary bolts' performance.
· Corrosion & Weather Resistance:
Equipped with advanced surface treatments (Dacromet, hot-dip galvanizing, zinc-nickel plating), they resist moisture, salt, and industrial pollutants, suitable for outdoor, coastal, and harsh railway environments, whereas ordinary bolts often have basic anti-corrosion treatments.
· Precision & Fit:
High-precision thread rolling ensures tight nut engagement and anti-loosening under continuous vibration; consistent dimensional tolerances match standard railway fastener systems. Ordinary bolts lack such specialized compatibility with railway components.
· Specialized Design:
Customizable head shapes (hex/oval/allen) and thread lengths adapt to concrete/wooden/steel sleepers and rail assembly needs. Ordinary bolts have universal designs, not tailored for railway-specific dynamic loads or structural requirements.
Established in 2005, our company has evolved over two decades of continuous development into a leading regional enterprise in the fastener industry with fully automated end-to-end production. With an annual output value exceeding RMB 130 million, our product range covers diverse market segments from mid-range to high-end and is distributed worldwide
Our factory & quipment
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