Description
Technical Parameters
Rail Screw Spike Fastening System
The Railway Screw Spike is a threaded fastener designed for secure rail anchorage in timber and composite sleepers. Manufactured from high-strength carbon steel, it features continuous helical threads that engage wood fibers for superior withdrawal resistance. This spike is installed using rotary torque rather than impact driving, minimizing sleeper damage. Its threaded design enables precise tension control and simplified removal during track maintenance.
Technical Specifications:
| Parameter | Specification |
|---|---|
| Product Type | Railway Screw Spike – Threaded Timber Fastener |
| Material Grade | Medium-carbon steel (1045 / 45# / AISI 4140) |
| Surface Treatment | Hot-dip galvanized / Zinc plating / Mechanical zinc |
| Nominal Length | 6.0" (152 mm) – 8.0" (203 mm) |
| Thread Diameter | 5/8" (16 mm) – 3/4" (19 mm) |
| Thread Pitch | Coarse thread (5 – 8 threads per inch) |
| Head Configuration | Square / Hex / Round with drive socket |
Installation & Maintenance Perspective:
- Features tapered helical threads that progressively compress wood fibers during insertion.
- Designed with thread pitch optimized for maximum holding with minimal installation torque.
- Incorporates thread relief near shank preventing stress concentration at timber surface.
- Utilizes self-tapping thread design eliminating pre-drilling in softer wood species.
- Provides consistent thread engagement depth through uniform helix geometry.
Maintenance & Operational Perspective
- Installed using portable hydraulic torque tools with calibrated output settings.
- Achieves exact depth control through automated shutoff mechanisms.
- Eliminates wood splitting associated with impact-driven fasteners.
- Enables consistent clamping pressure across multiple spikes per sleeper.
- Allows torque verification during installation for quality assurance purposes.
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