Rail Dog Spike Fastening System

The Railway Dog Spike is a traditional cut-spike fastener used to secure flat-bottomed rails to timber sleepers. Forged from low or medium-carbon steel, its distinctive L-shaped head hooks over the rail base while the square tapered shank drives into pre-drilled holes. This friction-based fastener provides rigid, non-elastic hold through wood fiber compression. It remains essential for heritage railways, industrial sidings, and low-speed branch lines worldwide.
Technical Specifications:
| Parameter | Specification |
|---|---|
| Product Type | Railway Dog Spike – Cut Spike Fastener |
| Material Grade | Q235B / 45# / 55# Carbon Steel |
| Shank Section | Square with rounded corners |
| Head Style | Offset L-shape (dog head) with two lugs |
| Standard Length | 5.5" (140 mm) / 6.0" (152 mm) / 6.5" (165 mm) |
| Shank Diameter | 5/8" (16 mm) – 3/4" (19 mm) |
| Point Angle | 25° ± 2° wedge-shaped tip |

Installation & Maintenance Perspective:
- Creates friction-based hold through wood fiber compression around the shank.
- Provides rigid, non-elastic connection without spring recovery capability.
- Resists rail uplift through hooked dog head engaging rail base.
- Relies entirely on timber condition for consistent holding performance.
- Allows periodic re-driving to maintain tightness after wood relaxation.
Maintenance & Operational Perspective
- Manufactured from inexpensive medium-carbon steel with 0.15-0.30% carbon.
- Receives minimal heat treatment, primarily relying on bulk material strength.
- Protected by hot-dip galvanizing or black oxide coating against corrosion.
- Produced to functional tolerances rather than precision engineering standards.
- Offers lowest initial fastener cost among all rail securing options.

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