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Help CenterNylon Sleeve for Screw Spike Fastening System DIN 20561 Compliant 8.8 Grade Steel Core
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As a professional manufacturer since 1998, Anping County Boli Hardware Wiremesh Products Factory is proud to present our Nylon sleeve for screw spike fastening system, fully compliant with DIN 20561 and featuring an 8.8 grade steel core. This product is engineered to deliver reliable performance in demanding railway and construction fastening applications. With an annual export value of US$5 million to US$10 million and shipments to global markets including North America, Europe, and Asia, our sleeves are trusted by professionals worldwide. The combination of durable nylon and high-strength steel ensures long service life and consistent clamping force.
Our nylon sleeve is designed for screw spike fastening systems used in railway tracks and structural steel connections. The nylon outer layer provides excellent insulation, corrosion resistance, and vibration damping, while the 8.8 grade steel core offers superior tensile strength and torque capacity. The sleeve is precision-machined to meet DIN 20561 dimensional tolerances, ensuring a perfect fit with standard screw spikes. Key features include:
- DIN 20561 compliance – Guarantees interchangeability and compatibility with international fastening systems.
- 8.8 grade steel core – High strength, suitable for heavy-duty clamping and repeated loading.
- Nylon sleeve – Resists moisture, chemicals, and UV degradation; reduces noise and vibration.
- Temperature range – Operates reliably from -40°C to +80°C (optional high-temperature variant available).
- Customizable dimensions – Length, outer diameter, and inner diameter can be tailored to your specific requirements.
- Easy installation – Smooth surface prevents galling and ensures quick assembly with standard tools.
Technical specifications are summarized in the table below:
| Parameter | Value |
| Standard | DIN 20561 |
| Core Material | Steel, 8.8 grade |
| Sleeve Material | Nylon (PA6 or PA66) |
| Tensile Strength (Core) | ≥ 800 MPa |
| Operating Temperature | -40°C to +80°C |
| Color | Black (standard), custom available |
| Packaging | Carton, pallet, or as per request |
The nylon sleeve acts as a protective barrier, preventing galvanic corrosion between the steel core and surrounding structures. This is especially critical in railway environments where moisture and chemicals are present. The 8.8 grade steel core is heat-treated to achieve optimal hardness and toughness, ensuring the sleeve maintains its clamping force even under dynamic loads. Our sleeves undergo rigorous quality control checks, including dimensional inspection and hardness testing, to ensure consistent performance.
We offer customization options for volume orders. Whether you need a specific length, a different color, or a modified inner diameter to fit unique screw spikes, our engineering team can work with you to develop the perfect solution. Minimum order quantities are flexible, and we typically ship within 15–30 days after order confirmation. Our port of shipment includes Tianjin, Qingdao, Shanghai, and Foshan, providing convenient logistics to major global destinations.
With over 25 years of manufacturing experience, a factory located in Hengshui, Hebei, and a strong track record of exporting to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East, Anping County Boli Hardware Wiremesh Products Factory is your reliable partner for high-quality fastening components. Our annual export value of US$5 million–US$10 million reflects the trust our customers place in us. We are committed to delivering products that meet or exceed your expectations, backed by responsive customer service and on-time delivery.
Contact us today for a quote or to discuss your specific requirements. Let our team help you secure the perfect fastening solution for your project.
Frequently Asked Questions
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Q: What materials are used in this sleeve?
A: The outer sleeve is made of high-quality nylon (PA6 or PA66), and the inner core is 8.8 grade steel. This combination provides both corrosion resistance and high strength. -
Q: Is the sleeve fully compliant with DIN 20561?
A: Yes, our sleeve is manufactured to meet the dimensional and performance requirements of DIN 20561, ensuring compatibility with standard screw spike fastening systems. -
Q: Can the sleeve be customized for different screw spike sizes?
A: Absolutely. We can adjust the length, outer diameter, and inner diameter to match your specific screw spike dimensions. Please contact us with your requirements. -
Q: What is the operating temperature range?
A: The standard version operates from -40°C to +80°C. For high-temperature applications, we can offer a variant with heat-resistant nylon (up to 120°C). -
Q: How long does the sleeve last under typical railway conditions?
A: The lifespan depends on load, environment, and maintenance. In typical railway applications, the sleeve can last 5–10 years or more, thanks to the durable nylon and steel core. -
Q: What packaging options are available?
A: Standard packaging is in cartons, then palletized. We can also provide custom packaging (e.g., bulk bags, small boxes) upon request. -
Q: Do you offer samples for testing?
A: Yes, we provide samples for evaluation. Please contact our sales team to arrange sample shipment (sample cost and freight charges apply). -
Q: What is the minimum order quantity (MOQ)?
A: MOQ is typically 500 pieces for standard sizes, but we can negotiate for smaller quantities or custom orders. Discuss with our team for details.
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