Joint Bolt M22x135

The M22x135mm railway joint bolt (commonly known as a fish bolt or track bolt) is a high-strength mechanical fastener engineered to connect rail ends together securely through joint fishplates. Installed directly through the aligned oval holes of rails and joint bars, its primary function is to prevent structural shifting, endure high wheel shock, and maintain a seamless, unbroken track line under intense dynamic loads.

Technical Specifications & Product Footprint

· Thread Diameter: 22 mm

· Bolt Length: 135 mm

· Thread Pitch: 2.5 mm

· Unit Weight: Approx. 0.45 kg

· Flush Oval/Hex Alignment: Engineered with a specialized head profile (often an oval or button neck) that locks firmly into the fishplate slot to allow effortless, single-wrench tightening without spinning.

· Mainline Track Compatibility: Optimized to secure intermediate-weight networks, performing as the benchmark connecting standard for R-43 and R-50 rail profiles.

· High Tensile Structural Strength: Forged from high-grade carbon steel or alloy steel (such as 45# steel) to meet standard mechanical property strength class 8.8, absorbing extreme longitudinal track stress caused by temperature variations.

· Anti-Vibration Design: Typically supplied as a full assembly matched with a heavy-duty rail nut and a high-elasticity double coil spring washer to neutralize constant train vibrations.

Custom Railway Joint Bolt Manufacturing by Signum

Signum Rail manufactures premium M22x135mm track bolts customized exactly to your global project blueprints, dimensional tolerances, and environmental criteria.

Why Partner with Signum?

· OEM Custom Precision: We forge railway fasteners strictly according to your client-provided drawings, custom lengths, and designated steel grades.

· High-Throughput 2-Shift Workforce: Our manufacturing facility operates on an optimized 2-shift rotation to maximize production uptime, compress lead times, and effortlessly fulfill high-volume infrastructure demands.

· Dedicated Quality Control Team: In-house QA personnel monitor the complete forging process, ensuring strict thread-go gauge validation, raw material traceability, and shear strength compliance.

· 3rd-Party Inspections Welcomed: To verify complete adherence to international railway standards, we fully support pre-shipment quality verification by independent bodies like SGS, Bureau Veritas (BV), or your own designated inspectors.

Complete Rail Fastener Catalog

Beyond the M22x135mm fish bolt, Signum supplies a comprehensive suite of track infrastructure components:

· Custom Track Bolts: Available in alternative international footprints (e.g., M24x135mm, M24x145mm).

· Dog & Screw Spikes: Forged in standard and imperial configurations (including 14x14x130mm and 24x170mm).

· Track Fastening Assemblies: Joint bars (fishplates), elastic rail clips, tie plates, and resilient rubber pads.

Contact Signum for a Quick Quote

Source heavy-duty, precision-forged rail joint bolts built to withstand high dynamic loads and severe weather.

To receive a quick quote, please reply with your target order volume, destination port for shipping terms, or attach your technical engineering drawings. Let us know how we can best support your upcoming manufacturing timeline.