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Help CenterHeavy Duty Railway Sleeper Dowel Pin 25mm Diameter 300mm Length Hot Dip Galvanized
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Welcome to Anping County Boli Hardware Wiremesh Products Factory – a trusted manufacturer since 1998 with an annual export value of US$5–10 million. Our Heavy Duty Railway Sleeper Dowel Pin (25mm diameter, 300mm length, Hot Dip Galvanized) is engineered to deliver superior performance in demanding rail infrastructure projects. With over two decades of expertise in hardware manufacturing, we combine precision forging, robust hot-dip galvanizing, and strict quality control to produce dowel pins that ensure long-term stability for railway sleepers. Whether you are upgrading existing tracks or constructing new lines, our dowel pins offer reliable anchoring, corrosion resistance, and easy installation – making them the preferred choice for contractors and railway maintenance teams worldwide.
Each dowel pin is manufactured from high-strength carbon steel or alloy steel (optional), then processed through a hot-dip galvanized (HDG) coating that exceeds ASTM or equivalent standards. The 25mm diameter and 300mm length are specifically designed to fit standard railway sleeper drilling patterns, providing a secure mechanical lock between the sleeper and the rail base. Our factory’s advanced production line ensures consistent tolerances, while the HDG layer offers exceptional resistance to rust, moisture, and chemical exposure, even in coastal or high-humidity environments.
| Parameter | Specification |
|---|---|
| Diameter | 25 mm (+/- 0.5 mm) |
| Length | 300 mm (+/- 2 mm) |
| Material Grade | Carbon Steel (Q235/SS400) or Alloy Steel (optional) |
| Surface Treatment | Hot Dip Galvanized (average coating thickness ≥ 55 μm) |
| Tensile Strength | ≥ 400 MPa (carbon steel), customizable |
| Application | Railway sleepers, timber ties, concrete sleepers |
| Packaging | Bundled with steel strapping or palletized, export standard |
Key Features & Customer Benefits
- Heavy Duty Construction: Designed for high-load railway environments, the 25mm diameter provides ample cross-section to resist shear and bending forces, ensuring the sleeper remains firmly anchored even under heavy train traffic.
- Hot Dip Galvanized Protection: The HDG coating forms a metallurgical bond with the steel, offering sacrificial protection against corrosion. This extends the service life of the dowel pin by 2–3 times compared to plain or electroplated pins, especially in outdoor and humid conditions.
- Precision Manufacturing: Our pins are produced with strict dimensional control, ensuring a smooth surface and consistent chamfered ends for easy driving into pre-drilled holes without jamming. This reduces installation time and labor costs.
- Versatile Compatibility: Suitable for both timber and concrete sleepers, the 300mm length allows for deep penetration and secure grip. It can also be customized to other lengths and diameters upon request.
- Eco-Friendly & Sustainable: Zinc is a naturally occurring element, and the hot-dip process is recyclable. Our manufacturing waste is minimized, and the long product lifespan reduces the need for frequent replacements, contributing to lower carbon footprint.
In addition to the standard carbon steel option, we offer alloy steel (e.g., 40Cr, 42CrMo) for applications requiring higher hardness or fatigue resistance. All pins undergo a rigorous quality inspection including dimensional checks, tensile testing, and coating thickness measurement. Our factory is equipped with a fully automated production line capable of outputting 500,000+ pieces per month, ensuring timely delivery for large-scale projects.
We have shipped our railway fasteners to markets across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and more. Our port options include Tianjin, Qingdao, Shanghai, and Foshan, providing flexible logistics solutions. As a manufacturer with over 25 years of history, we prioritize long-term partnerships and offer OEM/ODM services, custom packaging, and third-party inspection support.
Trust Anping Boli Hardware – your reliable partner for railway infrastructure components. Contact us today for a quote or sample request, and experience the durability and precision that have made us a preferred supplier in the global rail industry.
Frequently Asked Questions (FAQ)
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Q: What is the minimum order quantity (MOQ) for these dowel pins?
A: Our standard MOQ is 5000 pieces for stock sizes. For custom specifications, MOQ may be negotiable. We are happy to discuss trial orders for new customers. -
Q: Can you provide samples before bulk order?
A: Yes, we offer free samples for freight collect. Please contact us with your shipping details and we will arrange sample shipment within 3–5 working days. -
Q: What is the lead time for production?
A: For standard 25x300mm HDG dowel pins, lead time is 10–15 days after receipt of deposit. Custom orders may require 15–25 days depending on specification and quantity. -
Q: Are these dowel pins suitable for concrete sleepers?
A: Yes, they are designed for both timber and concrete sleepers. However, for concrete sleepers, we recommend checking the hole diameter tolerance to ensure a proper fit. Our technical team can advise on the best pin design for your specific sleeper type. -
Q: How do you ensure the quality of hot-dip galvanizing?
A: We conduct a coating thickness test using a magnetic gauge, and also perform a visual inspection for uniformity, adhesion, and absence of bare spots. Our HDG process follows the requirements of ISO 1461 or equivalent standards. -
Q: Do you provide third-party inspection or certification?
A: Yes, we can arrange third-party inspection by SGS, BV, or other accredited bodies at the buyer's cost. We also provide a mill test certificate for the material upon request. -
Q: What is the packaging method for export?
A: Standard packaging is in bundles with steel strapping, then loaded on pallets. For sea freight, we use waterproof plastic wrapping and fumigation-free wooden pallets (if required). Custom packaging (e.g., small boxes, polybags) is available upon request. -
Q: Can you produce dowel pins with different diameters and lengths?
A: Absolutely. Our production line is flexible. We can manufacture diameters from 16mm to 32mm and lengths from 200mm to 500mm (or even longer). Please provide your drawing or specifications for a quotation.
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