Description
Technical Parameters
Railway Screw Spikes
| Category | Parameter | Description / Standard Value |
|---|---|---|
| General Info | Product Name | Railway Screw Spike / Lag Screw Spike |
| Application | Fastening rails to wooden sleepers. | |
| Dimensional Specs | Common Diameters | 5/8" |
| Common Lengths | 4-1/2" | |
| Thread Type | Square Thread / Lag Thread | |
| Thread Pitch | e.g., 4 threads per inch (for 1" spike) | |
| Head Type | Square Head (Most Common), Hex Head | |
| Material & Grade | Standard Material | Medium Carbon Steel |
| Common Standards | ASTM A1 - Standard Specification for Carbon Steel Tee Rails AREMA (Chapter 5) - American Railway Engineering and Maintenance-of-Way Association BS 500 - British Standard (Specifies dimensions) |
|
| Finish | Black (Plain) | |
| Mechanical Properties | Hardness | Typically ~ HB 241-302 |
| Tensile Strength | ~ 64 kgf/mm² (min) |
Key Terminology Explained:
- Square Head: A four-sided head that prevents the spike from rotating in the sleeper once installed and is easy to grip with a wrench.
- Lag Thread: A coarse, sharp thread designed to cut into and grip wood securely, providing excellent pull-out resistance.
- Wooden Sleeper (Tie): The rectangular support made of hardwood (like oak) that the spike screws into.
- ASTM A1: A widely recognized American standard that covers the chemical and mechanical properties of steel used for rails and related components.
- AREMA: The leading industry group in North America that publishes standards for railway design and construction.
- Hot-Dip Galvanized: A coating process where the steel spike is dipped in molten zinc, providing a thick, durable layer for corrosion protection, essential for outdoor railway environments.
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