Description
Technical Parameters
Rail Screw Spike Fastening System
The Railway Screw Spike is a threaded fastening device used to attach rails or base plates to timber sleepers in traditional track construction. Formed from medium-carbon steel and case-hardened for wear resistance, it features a tapered self-tapping thread that cuts into pre-drilled holes. Installed with rotary torque rather than impact, this spike provides superior holding power while allowing clean removal for track maintenance or renewal operations.
Technical Specifications:
| Parameter | Specification |
|---|---|
| Product Type | Railway Screw Spike – Threaded Fastener |
| Material | 1045 / 1541 / 45# Medium-carbon steel |
| Hardness | Case 45-55 HRC, Core 25-35 HRC |
| Thread Form | Asymmetric buttress wood thread |
| Length Options | 5" – 10" (127 – 254 mm) |
| Nominal Diameter | 1/2" – 7/8" (13 – 22 mm) |
| Head Drive | 3/4" – 1-1/8" hex / Square drive |
| Finish | Zinc phosphate / Hot-dip galvanized |
Installation & Maintenance Perspective:
- Provides 3-5 times greater pull-out resistance than cut spikes.
- Resists loosening from track vibration through thread friction.
- Maintains clamp force despite wood shrinkage or swelling.
- Performs consistently across varying wood moisture content.
- Withdrawal resistance increases during initial service period.
Maintenance & Operational Perspective
- Torque curve reveals wood density variations or hidden defects.
- Consistent depth achieved using automatic shutoff on torque tools.
- Stripped threads indicate oversized pilot hole or wood decay.
- Cross-threading prevented by tapered lead thread design.
- Installation angle deviation visible through head alignment.
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