Description
Technical Parameters
Railway Screw Spikes - Basic Specifications & Material
| Parameter | Description | Common Standards / Notes |
|---|---|---|
| Product Name | Railway Screw Spike / Coach Screw | Used with elastic rail fastening systems on concrete sleepers. |
| Primary Function | To anchor the rail fastening assembly (e.g., shoulder, clip) to the sleeper by threading into a plastic or nylon dowel inserted in the sleeper. | Provides a strong, reliable, and adjustable connection. |
| Typical Material | Medium Carbon Steel | Must have high strength and toughness. |
| Common Grades | Q/CR 563 (8.8 Grade) (China), ISO 898-1 Grade 8.8, AISI 1045 | Grade 8.8 is the most common for this application. |
| Surface Treatment | Hot-Dip Galvanizing, Geomet (Dacromet) coating, or Electro-galvanizing | Critical for corrosion protection. Geomet/Dacromet offers excellent corrosion resistance without affecting threads. |
| Thread Type | Metric Coarse Thread (e.g., M24) or Special Thread Form | The thread must be compatible with the insert/dowel in the sleeper. |
| Key Mechanical Properties | Property Class (e.g., 8.8): Tensile Strength, Yield Strength, Hardness | Must meet the requirements of the specified property class. |
Supplier Quotation Request Template
| Quotation Item | Your Specification / Requirement | Supplier to Provide / Confirm |
|---|---|---|
| Product Description | Railway Screw Spike | Confirm understanding and provide their product code/model. |
| Applicable Standard | e.g., Q/CR 563, ISO 898-1, or Customer Drawing No. ________ | Specify the exact technical standard or provide detailed drawings. |
| Property Class | e.g., 8.8 | Confirm the mechanical property class. |
| Size & Thread | e.g., M24 x 175 mm (Diameter x Length) | Confirm thread pitch, under-head length, and total length. |
| Material Grade | e.g., ML20MnTiB or AISI 1045 | Confirm material grade and provide Mill Test Certificate (MTC). |
| Surface Treatment | e.g., Geomet Coating (5-8 μm) or Hot-Dip Galvanized | Confirm treatment type, standard, and coating thickness. |
| Compatible Insert | e.g., For M24 Skl-12 type dowel | Confirm the screw is designed for the specific dowel in your system. |
| Quantity | e.g., 15,000 pieces | Provide the total required quantity. |
| Unit Price | [To be filled by supplier] | Price in USD/piece or USD/100 pcs. |
| Lead Time | [To be filled by supplier] | Estimated production and delivery time after order confirmation. |
| Package | e.g., In carton boxes, 50 pcs/box |
Confirm packaging details. |
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