C0 Lag Screw Compatibility with Pandrol Systems | Signum Rail

The C0 lag screw—also known as a C0 railway screw spike, sleeper screw, or Tirafondos Tipo C0—is an ultra-heavy-duty fastener designed for high-stress track environments. When deploying baseplate-style track configurations on wooden or composite ties, the C0 lag screw provides an exceptionally strong anchoring solution for Pandrol fastening systems.

The defining difference of the C0 model is its extended reach, featuring a massive 23×150mm dimensions profile (longer than the standard A0 23×105mm and B0 23×125mm variants) for maximum thread engagement and pull-out protection.

Pandrol Fastening System Integration

A C0 lag screw does not snap directly onto elastic clips like the Pandrol e-Clip or Fastclip. Instead, it acts as the foundation anchor:

1. The C0 screw passes through a Pandrol tie plate (baseplate).

2. It rigidly anchors the baseplate down into wooden or composite railroad sleepers.

3. Pandrol clips are then mechanically driven into the baseplate's housings to clamp down the rail foot.

Applications & Geographies

· Track Conditions: Highly specified for high-tonnage heavy haul lines, sharp curves, high-vibration turnouts, and coastal tracks requiring Hot-Dip Galvanization (HDG).

· Global Use: Highly prominent across South American and African rail infrastructure networks to maximize timber tie lifespan.

Key Installation Parameters

· Deep Pilot Holes Mandatory: Because the C0 is 150mm long, pre-bored pilot holes must be drilled deeper to prevent composite or hardwood sleepers from splitting.

· Maximum Hold: The deep threaded profile delivers the highest vertical extraction resistance available, virtually eliminating track gauge widening.

Premium C0 Lag Screw Manufacturing by Signum Rail

Signum Rail Fasteners manufactures premium railway lag screws, sleeper screws, and custom rail fasteners tailored strictly to your technical drawings.

· Custom OEM Production: Built to your exact blueprint requirements, material grades, and thread specifications.

· High Output: Operating with a 2-shift labor force to meet tight transit project deadlines.

· Rigorous QC: Complete quality control from raw steel analysis to final thread precision.

Contact Signum Rail today to request a rapid quote.