Name: China Screw Spike Railroad Fastening System Manufacturers Suppliers Factory - GNEE RAIL
Brand: GNEE
SKU: 295938754

Screw Spike Railroad Fastening System

The screw spike is also known as rail screw. As one kind of Rail spike, it is a metal screw for fixing rail fasteners. Screw spike is usually made of NO.3 steel. Because its nail rod surface has thread, so it is called screw spike. The pull-out resistance is 0.5 ~ 1.0 times larger than that of common rail spike, but the thrust resistance is 50% less. Due to disassembly and assembly inconvenience, it is difficult to adjust the rail gauge, which is generally used on the railway turnout.For meeting various needs of clients, we can offer coach screws, stud screw, railway sleeper screws and other coustom screw spike in railway.

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Description

Technical Parameters

↵Rail Screw Spike Fastening System

The Railway Screw Spike is a threaded fastening component engineered to secure rails to sleepers through rotational insertion, generating significant clamp force that resists vertical lift and lateral track movement. Unlike conventional dog spikes that rely on friction alone, its helical thread form engages with the substrate-whether timber, concrete with pre-installed dowels, or composite sleepers-to create a mechanical interlock that maintains consistent tension and prevents the progressive loosening caused by dynamic train-induced vibrations and thermal expansion cycles .

Technical Specifications:

Feature	Railway Screw Spike	Traditional Cut Spike (Dog Spike)
Holding Mechanism	Helical thread mechanical interlock	Friction-only wedge fit
Installation Method	Rotational driving (torque-controlled)	Impact driving (stroke-controlled)
Tension Maintenance	Retains residual torque; works with spring washers	Progressive loosening under vibration
Substrate Compatibility	Timber, concrete (with dowels), composite	Timber only
Removal/Reusability	Can be unscrewed; minimal sleeper damage	Destructive pull-out; damages sleeper fibers
Corrosion Protection	Galvanized, blued, or oiled finishes available	Usually plain or minimally coated

Installation & Maintenance Perspective:

Holding Power & Tension Maintenance: The helical thread design converts rotational torque into substantial downward clamping force, maintaining plate-to-tie friction that reduces stress on the entire fastening system by up to 80% .

Installation Versatility: Engineered for multiple track construction methods, these spikes function effectively in timber sleepers, concrete sleepers with plastic dowels, or as cast-in inserts during concrete sleeper manufacturing .

Corrosion Resistance & Longevity: Manufactured with protective surface treatments and controlled material chemistry to withstand decades of exposure to moisture, de-icing chemicals, and ballast abrasion without section loss .

Maintenance & Operational Perspective

Friction Preservation: When installed with spring washers, the assembly maintains critical friction between tie plates and sleepers, dramatically reducing spike loads that cause fatigue failures .
Residual Tension: The thread profile is designed to retain a percentage of installation torque over time, ensuring gage retention even as timber sleepers naturally compress and season.
Uplift Resistance: The mechanical thread interlock provides superior resistance to vertical rail movement compared to cut spikes, preventing the "spike uplift" phenomenon observed under heavy axle loads .