Railway Fastener System Solutions
Railway fastener system solutions including SKL, E, KPO and NABLA types for railway and metro applications.
Engineered for stability, vibration control and long-term performance.
What Is a Railway Fastener System?
A railway fastener system is a critical track component used to securely fix rails to sleepers while maintaining gauge, absorbing vibration, and ensuring long-term track stability.
It directly affects track performance, including:
- Load distribution
- Vibration and noise control
- Rail alignment and safety
- Maintenance frequency and service life
At Glory Rail, we don’t just supply individual components — we provide complete railway fastener system solutions tailored to different track structures, load conditions, and project requirements.
Our product range covers multiple internationally recognized fastening systems, including SKL, E, KPO, and NABLA types, each designed for specific applications.
Find the Right Fastening System for Your Project
SKL Rail Fastening System
The SKL fastening system is widely used in heavy-duty railway applications, offering high clamping force and reliable rail fixation under dynamic loads.
Key Components
SKL tension clamp
Guide plate
Rail pad
Screw spike / anchor bolt
Advantages
✔ High resistance to rail movement
✔ Suitable for high-speed and heavy haul
✔ Long service life
Component | Quantity | Material | Size | Remarks |
SKL Tension Clip | 2 | 60Si2Cra | Diameter: 13mm | Hardness: 42 – 47HRC Fatigue life: No fracture after 5 million cycles Standards: DIN 17221, GB/T 1222 |
SS35 Screw Spike | 2 | M24×150mm, M24×160mm, M24×180mm or customized | Grade 4.6: Q235; Grade 5.6: 35#; Grade 8.8: 45# | Standards: ISO 898-1, UIC 864-1 and NF F 500-50 Can be inserted into concrete sleepers |
Flat Washer | 2 | ULS7 | / | / |
Plastic Dowel | 2 | Determined according to the size of the screw spike | HDPE | / |
Guide Plate | 2 | Reinforced Nylon 66 (PA66) | UIC54, UIC60, 50kg rail, 60kg rail or customized | / |
Rail Pad | 1 | EVA or Rubber | UIC54, UIC60 or customized | / |
E Fastening System
The E fastening system features a symmetrical elastic clip design, providing reliable rail holding with fewer components for easy installation and maintenance.
Key Components
E-type spring clip (e.g., E1, E2, E3)
Rail pad
Baseplate (optional)
Screw spike / dowel
Advantages
✔ Simple and compact structure
✔ Low installation and maintenance cost
✔ Good performance for conventional and urban rail
Item included | Quantity | Material | Size | Remark |
E clip | 2 | 60Si2MnA, 60Si2CrA | Dia. 16mm,18mm or 20mm (E1809, E2006,E2007,E2009,etc | Hardness: 44-48HRC |
Toe Load: Dia.16mm: 500-700kgf; Dia.18mm:750-900kgf; Dia.20mm:1100-1400kgf | ||||
Fatigue life: 5 millions cycles without breaking | ||||
Standard: DIN17221, BS970, GB/T1222 | ||||
Shoulder | 2 | QT500-7, QT450-10 | For UIC54, UIC60, 115RE, BS80lbs, BS100lbs, 50kg rail, 60kg rail, etc. | Note: Hardness of E-clip is 44-48HRC; Toe Load for E-clip is 500-700kgf (Dia.16mm); 750-900kgf(Dia.18mm); 1100-1400kgf(Dia.20mm); Fatigue life of E-clip is 5 millions cycles without breaking DIN17221, BS970, GB/T1222 qualified E-clip |
Rail pad | 1 | HDPE, rubber or EVA | ||
Insulator | 2 | Reinforced Nylon 66 (PA66) |
KPO Fastening System
The KPO fastening system is a modular, high‑insulation solution designed for electrified transit lines, offering superior stray current protection and elastic resilience.
Key Components
KPO spring clamp (similar to SKL)
Insulated housing / base plate
Rail pad (high electrical resistance)
Screw spike / anchor bolt
Advantages
✔ Very high electrical insulation (>10 kΩ·cm)
✔ Effectively prevents stray current corrosion
✔ Adjustable for track geometry tolerances
Component | Quantity | Type | Material |
KPO Clip | 2 | KPO3, KPO6, KPO9 | Q235 |
Screw Spike | 4 | M24×150mm, M24×160mm, M24×180mm | Grade 4.6: Q235; Grade 5.6: 35#; Grade 8.8: 45# |
HS Bolt | 2 | HS26, HS32 | Grade 4.6: Q235; Grade 5.6: 35#; Grade 8.8: 45# |
Hexagon Nut | 2 | Customizable | Grade 5: 35#; Grade 8: 45# |
Double Coil Spring Washer | 2 | Customizable | 65Mn |
Base Plate | 1 | Customizable | Casting: QT500-7, QT450-10; Forging: Low-carbon Steel or High-carbon Steel |
NABLA Rail Fastening System
The NABLA rail fastening system uses a distinctive V‑shaped or butterfly clip, delivering high elastic flexibility and excellent anti‑rotation stability for tight curves and low‑noise track sections.
Key Components
NABLA butterfly / V‑shaped clip
Rail pad (variable stiffness)
Baseplate with side restraint
Screw bolt / anchor
Advantages
✔ High elastic flexibility – reduces wheel impacts
✔ Excellent anti‑rotation – ideal for sharp curves
✔ Suitable for bridges, tramways, and low‑noise zones
Components | Quantity | Materials | Dimensions | Specifications |
Nabla Clip | 2 pieces | 60Si2MnA, 60Si2CrA | Thickness: 4mm or 4.5mm | Hardness: 42 – 47HRC; Fatigue life: withstanding 3 million – cycle without fracture |
Bolt | 2 pieces | Grade 5.6: 35# steel | Compatible with UIC54, UIC60, 50kg – rail and 60kg – rail | Thread specifications follow relevant railway standards |
Spring Washer | 2 pieces | ML08 AI | 18.25×34×78mm | Elasticity and mechanical properties meet railway fastening requirements |
Insulating Parts | 2 pieces | Reinforced Nylon 66 (PA66) | Adapted to UIC54, UIC60, 50kg – rail and 60kg – rail | Density: 1.3 – 1.45g/cm³; Tensile Strength: ≥170MPa; Elongation: ≤4.4%; Flexural Strength: ≥250MPa; Un – notched Impact Strength: ≥80kJ/m²; Melting Point: 250 – 270℃; Insulation Resistance: ≥1×10⁸Ω; Glass Fiber Content: 30 – 35%; Hardness: ≥110HRR |
Rail Pad | 1 piece | Rubber | For UIC54, UIC60, 50kg – rail and 60kg – rail | Rail – specific shapes and dimensions to ensure proper fit and cushioning |
Need Help Selecting the Right Fastener System?
We help you choose the most suitable fastening solution based on rail type, load conditions and installation environment.