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Help CenterNylon Sleeve for Concrete Sleepers, 25mm ID x 40mm OD, ISO 9001 Factory, UV Stabilized
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As a leading manufacturer with over 25 years of experience, Anping County Boli Hardware Wiremesh Products Factory (established 1998) proudly presents our Nylon Sleeve for Concrete Sleepers with precise 25mm inner diameter and 40mm outer diameter. Engineered for durability and reliability, this sleeve is UV stabilized to withstand harsh outdoor environments, making it an ideal choice for railway infrastructure projects worldwide. Our ISO 9001 certified factory ensures consistent quality and tight tolerances, delivering products that meet the demanding requirements of modern track systems.
This nylon sleeve is specifically designed to fit concrete sleepers, providing a protective and insulating layer for fastening components. The 25mm ID accommodates standard bolts or rods, while the 40mm OD offers robust wall thickness for mechanical strength. With UV stabilization, the sleeve resists degradation from sunlight exposure, ensuring long service life in outdoor installations. The material is also resistant to moisture, chemicals, and impact, making it suitable for diverse climatic conditions.
Key Features & Benefits
- Precision Dimensions: 25mm ID x 40mm OD with tight tolerance (±0.2mm) for perfect fit in concrete sleeper holes.
- UV Stabilized: Special additive prevents yellowing, cracking, and brittleness even after years of direct sunlight.
- High Mechanical Strength: Nylon material provides excellent load-bearing capacity and impact resistance.
- Chemical & Moisture Resistance: Suitable for use in tunnels, bridges, and coastal areas where corrosion is a concern.
- Easy Installation: Smooth surface reduces friction, allowing quick assembly with standard tools.
- Customizable Length: Available in various lengths from 50mm to 200mm, or tailored to your specifications.
- ISO 9001 Quality: Manufactured in a factory with ISO 9001 certification, ensuring consistent batch-to-batch quality.
Technical Specifications
| Parameter | Value |
|---|---|
| Inner Diameter (ID) | 25 mm ±0.2 mm |
| Outer Diameter (OD) | 40 mm ±0.2 mm |
| Wall Thickness | 7.5 mm |
| Material | Nylon (PA6 or PA66, as per request) |
| Color | Black (custom colors available) |
| UV Stabilization | Yes, with UV stabilizer additive |
| Operating Temperature | -40°C to +120°C |
| Length | Customizable (standard: 50, 100, 150, 200 mm) |
Our nylon sleeves are manufactured using injection molding with strict quality control. Each batch undergoes dimensional inspection and UV resistance testing to ensure compliance with industry standards. The sleeves are designed to reduce vibration, dampen noise, and protect the concrete sleeper from wear caused by metal fasteners. They are widely used in railway track maintenance, new line construction, and repair projects.
Why Choose Anping Boli?
With an annual export value of US$5–10 million and a global presence spanning North America, South America, Europe, Asia, Africa, and Oceania, we have built a reputation for reliability and quality. Since 1998, our factory in Hengshui, Hebei has been dedicated to producing hardware and wire mesh products, and we have expanded our expertise to include precision nylon components. Our ISO 9001 certification reflects our commitment to continuous improvement and customer satisfaction. We offer flexible shipping from ports like Tianjin, Qingdao, Shanghai, and Foshan, with prompt delivery times. Whether you need a small trial order or a large-volume supply, we are ready to support your project.
Contact us today to request a quote, sample, or custom specification. Our team will respond within 24 hours to discuss your requirements. Trust Anping Boli for durable, UV-stabilized nylon sleeves that keep your railway infrastructure safe and efficient.
Frequently Asked Questions (FAQ)
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Q: What material is the sleeve made of?
A: Our sleeve is made of engineering-grade nylon (PA6 or PA66), which offers excellent mechanical properties and resistance to wear, chemicals, and UV radiation. -
Q: Can I get a different inner diameter or outer diameter?
A: Yes, we accept custom orders. Please provide your required dimensions, and we will produce accordingly. Minimum order quantity may apply for custom sizes. -
Q: Is the UV stabilization effective for long-term outdoor use?
A: Absolutely. The UV stabilizer additive is incorporated into the nylon matrix, providing protection against sun damage for extended periods, typically 5–10 years depending on intensity. -
Q: How long does the sleeve typically last in railway applications?
A: Service life depends on environmental conditions and load, but under normal use, the sleeve can last for decades without significant degradation. -
Q: Do you provide free samples for testing?
A: Yes, we offer free samples for evaluation. The buyer only needs to pay for shipping charges. Contact us to arrange a sample. -
Q: What is the minimum order quantity (MOQ)?
A: For standard sizes, the MOQ is 500 pieces. For custom sizes, it may vary based on complexity. We also accept small trial orders. -
Q: How should I install the sleeve?
A: Simply insert the sleeve into the pre-drilled hole of the concrete sleeper, then pass the bolt or rod through the center. The tight fit ensures stability. No special tools required. -
Q: Do you have quality certifications?
A: Our factory is ISO 9001 certified, and we conduct thorough in-house inspections. We can provide a certificate of analysis upon request.
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