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Help CenterNylon Sleeve for Screw Spike Fastening System, 1 Year Warranty, Mill Test Report Provided
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Welcome to Anping County Boli Hardware Wiremesh Products Factory, a trusted manufacturer since 1998, specializing in high-quality rail fastening components. Our Nylon Sleeve for Screw Spike Fastening System is engineered to provide reliable insulation and secure fixation for railway tracks. With an annual export value of US$5-10 million and a global presence across North America, South America, Europe, and Asia, we are committed to delivering precision parts that meet the rigorous demands of modern rail infrastructure. Each sleeve comes with a 1-year warranty and a mill test report, ensuring traceable quality and performance.
Our nylon sleeves are designed to fit seamlessly into screw spike fastening systems, commonly used in railway track construction and maintenance. The sleeves act as a protective insulator, preventing direct metal-to-metal contact between the screw spike and the rail base, reducing vibration, noise, and corrosion. Made from high-grade engineering nylon (PA6 or PA66), these sleeves offer excellent wear resistance, impact strength, and dimensional stability even under heavy loads and extreme weather conditions.
Key Features & Technical Specifications
- Material: Premium Nylon (PA6/PA66) – UV stabilized, flame retardant optional.
- Dimensional Accuracy: CNC machined or injection molded to tight tolerances (±0.1mm).
- High Dielectric Strength: Provides electrical insulation for signaling systems.
- Temperature Range: -40°C to +120°C, suitable for global climates.
- Easy Installation: Pre-drilled holes or cylindrical design for quick assembly with standard screw spikes.
- Customizable: Available in different lengths, inner diameters, and outer diameters to match specific rail profiles.
- Warranty: 1 year against manufacturing defects.
- Mill Test Report: Provided with each batch, confirming material composition and mechanical properties.
| Parameter | Standard Value | Notes |
|---|---|---|
| Material | Nylon 6 / Nylon 66 | UV stabilized, ROHS compliant |
| Outer Diameter | 30mm – 50mm (custom) | Adaptable to rail base recess |
| Inner Diameter | 22mm – 28mm (for screw spike) | Tight fit to prevent movement |
| Length | 50mm – 120mm | Customizable per order |
| Tensile Strength | ≥ 60 MPa | Tested per ASTM D638 |
| Impact Strength (Izod) | ≥ 5 kJ/m² | At 23°C |
| Operating Temperature | -40°C to +120°C | Continuous use |
| Warranty | 1 Year | Defects in material & workmanship |
Benefits for Your Rail Projects
- Extended Track Life: The nylon sleeve minimizes wear on both the screw spike and the rail base, reducing maintenance frequency.
- Vibration Dampening: Absorbs dynamic loads, leading to quieter operation and improved passenger comfort.
- Cost-Effective: Direct factory pricing eliminates middlemen, offering competitive rates without compromising quality.
- Reliable Supply: With production capacity exceeding 500,000 pieces per month, we can handle large orders with consistent lead times.
- Global Standards: Our sleeves are designed to comply with common rail fastening standards (e.g., AREMA, UIC, GB).
At Anping Boli, we understand that rail infrastructure demands parts you can trust. That’s why every nylon sleeve we ship is accompanied by a Mill Test Report detailing material grade, mechanical properties, and dimensional inspection results. Our 1-year warranty gives you peace of mind, knowing that we stand behind our product. Since 1998, we have served customers in over 30 countries, exporting from Tianjin, Qingdao, Shanghai, and other major ports. Our main markets include North America, Europe, Southeast Asia, and Africa, and we are proud to be a preferred partner for railway maintenance companies and OEMS.
Ready to enhance your track fastening system? Contact us today for a quote or sample. Our engineering team can help you select the right sleeve dimensions for your specific screw spike and rail profile. With our flexible customization options and fast turnaround, we are your ideal partner for long-term rail projects.
Frequently Asked Questions
Q1: What is the main purpose of a nylon sleeve in a screw spike fastening system?
A: The nylon sleeve acts as an insulator and buffer between the screw spike and the rail base. It prevents galvanic corrosion, reduces vibration, and ensures proper alignment of the rail fastening system.
Q2: Can the sleeves be customized to fit different screw spike diameters?
A: Yes, we offer customization. Our sleeves can be made with inner diameters ranging from 22mm to 28mm (or other sizes upon request) and outer diameters to match your rail base recess. Please provide your specifications.
Q3: What materials are available besides nylon?
A: While nylon (PA6/PA66) is our standard, we can also produce sleeves in PE, PP, or polyurethane based on your application requirements. However, nylon offers the best balance of strength, insulation, and durability for rail use.
Q4: Do you provide a mill test report? What does it include?
A: Yes, a mill test report is provided with each shipment. It includes material grade, density, tensile strength, elongation, impact resistance, and dimensional verification results. This ensures full traceability.
Q5: What is the typical lead time for an order?
A: For standard sizes, lead time is 15-20 days after order confirmation. For custom sizes, it may take 25-30 days, depending on quantity. We can expedite for urgent orders (subject to stock).
Q6: How many pieces can you produce per month?
A: Our monthly production capacity exceeds 500,000 pieces, allowing us to handle large-volume contracts efficiently. We maintain a buffer stock for popular sizes.
Q7: Do you offer samples for testing?
A: Yes, we provide free samples (up to 5 pieces) for qualified buyers. The buyer only needs to cover the shipping cost. Please contact us to request samples.
Q8: What payment terms do you accept?
A: We accept T/T (30% deposit, balance before shipment) and L/C at sight. For long-term partnerships, other terms can be negotiated.
If you have any other questions, please feel free to reach out. Our team is ready to assist you with technical support and after-sales service.
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