HS26 Rail T-Bolt

In railway infrastructure, track stability depends entirely on the integrity of the fastening system. A critical component for securing modern networks is the HS26 Rail T-Bolt (also known as the HS26 clip bolt or clamping bolt).

For procurement managers and rail engineers, sourcing high-tensile fasteners that meet strict international standards is essential for operational safety. Below, Signum Rail Fasteners China outlines the technical specifications and manufacturing options for the HS26 T-bolt system.

What is an HS26 Rail T-Bolt?

An HS26 Rail T-Bolt (also widely referred to as an HS26 clip bolt or clamping bolt) is a heavy-duty, high-strength industrial fastener specifically designed to secure railway tracks by connecting tie plates (baseplates) and rail clamps together. The "T" shape of its head allows it to slide into a designated channel or slotted groove in a ribbed baseplate, where it locks tightly into position when a heavy series nut and spring washer are torqued down from above.

The HS26 rail T-bolt is primarily designed for and used in the KPO Clamp Rail Fastening System (often referred to simply as the K-Type or KP fastening system).

It also sees widespread compatibility with specific rigid and elastic metric track layouts throughout Europe and Asia.

Technical Specifications & Dimensions

Every HS26 rail bolt manufactured by Signum Rail Fasteners China adheres strictly to the UIC 864-2 standard:

· Thread Specification: Metric M22 (Standard coarse pitch thread)

· Matching Hardware: Heavy hex nut (Width Across Flats S = 39 mm, Height H = 22 mm) and heavy-duty railway spring washers.

Common Configurations & Theoretical Weights

The HS26 is typically deployed in three primary lengths depending on the application:

· HS26/55 (M22 × 55mm): Total assembly weight approx. 0.450 kg/set (Used for low-profile clip systems).

· HS26/65 (M22 × 65mm): Total assembly weight approx. 0.475 kg/set (The standard industrial baseline).

· HS26/90 (M22 × 90mm): Total assembly weight approx. 0.549 kg/set (Bolt only weight: ~0.344 kg; used in heavy-haul systems).

Mechanical Properties & Steel Material Grades

To withstand intense dynamic loads and constant track vibrations, Signum manufactures bolts across multiple strength classes using premium carbon and alloy steel:

· Standard Grades (Class 4.6 & 5.6): Ideal for light rail networks, industrial sidings, and low-load freight tracks.

· High-Tensile Grades (Class 8.8 & 10.9): Quenched and tempered for mainlines, high-speed rail, and heavy-haul mining corridors where maximum shear resistance is required.

Industrial Surface Treatments

To protect against harsh weather, coastal salinity, and acidic environments, Signum offers four industry-standard finishes:

· Plain / Black Oxide: Coated with premium anti-rust oil for immediate installation.

· Hot-Dip Galvanized (HDG): Thick zinc layer for superior, long-term atmospheric corrosion resistance.

· Zinc Plated: Electro-galvanized for precise thread tolerances and a clean finish.

· Dacromet Coating: Premium salt-spray resistance with zero risk of hydrogen embrittlement.

Why Source from Signum Rail Fasteners China?

As a dedicated rail fasteners factory in China, Signum Rail Fasteners China combines localized manufacturing cost-efficiencies with world-class engineering precision.

Custom Manufacturing According to Client Drawings

Global track environments vary significantly. If your infrastructure project requires non-standard thread pitches, unique head geometries, custom lengths, or specific steel grades, our in-house engineering team can manufacture exact-match rail T-bolts based entirely on your proprietary drawings, technical specifications, or physical blueprints.

Request a Factory-Direct Quote

Are you drafting a Bill of Materials (BOM) or launching an RFP for an upcoming railway project? Contact our export team today to receive detailed technical drawings, material test certificates (MTC), or a competitive price quotation.