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Features

Specifications

Material: PA6, PA66, PA66+30% Glass Fiber Reinforced

Tensile Strength: 150MPa (PA66), 170MPa (PA66+30% Glass Fiber)

Temperature Range: -40°C To +120°C

Melting Point: 260°C-300°C (PA66)

Insulation Resistance: ≥1×10¹⁰Ω

Thread Type: International Railway Standard

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PA6 Railroad Dowel

Nylon PA66 Railway Dowel

UV Resistance Plastic Railway Dowel

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UV Resistance Plastic Railway Dowel Nylon PA66 PA6 Railroad Dowel

Product Description

Plastic Dowel SDU25 SDU26 Nylon PA66 PA6

Rail Plastic Dowel PA6 PA66 Nylon - Concrete Sleeper Threaded Insert for Railway Fastening System

Product Overview

Our Rail Plastic Dowel PA6 PA66 Nylon, also widely known as railway threaded plastic insert, concrete sleeper plastic sleeve, and rail fastening nylon dowel, is a core embedded component specially designed for railway concrete sleeper fastening systems. Engineered for pre-embedding in prestressed concrete sleepers, this precision-molded nylon dowel features integral internal threaded structures, perfectly matching railway screw spikes and rail bolts to form a stable, durable, and high-safety railway track fixing system.

As an indispensable foundational part of modern rail fastening infrastructure, it effectively connects rail fasteners, elastic clips, and concrete sleepers, bearing track dynamic load, vibration impact, and environmental erosion, ensuring the long-term stable operation of railway tracks. Available in pure PA6, pure PA66, and PA66+30% glass fiber reinforced specifications, our dowels fully adapt to light-duty, medium-duty, and heavy-haul railway line requirements, covering ordinary speed railways, high-speed railways, urban subways, light rails, and industrial railway sidings worldwide.

Core Product Definition & Working Principle

The rail plastic nylon dowel is a rigid engineering plastic embedded part pre-cast inside concrete sleepers during sleeper production. Different from ordinary plastic fasteners, this product is customized with standard internal threads that precisely cooperate with rail screw spikes. After the concrete sleeper molding is completed, the dowel is firmly fixed inside the concrete base without loosening or falling off.

During track installation and maintenance, construction workers can directly screw rail screw spikes into the internal threads of the nylon dowel. With the excellent friction locking force and tensile resistance of nylon materials, the dowel transmits and disperses the vertical pressure, lateral thrust, and longitudinal traction generated by train operation between the rail and concrete sleeper. It solves the common problems of metal embedded parts such as easy rust, electric conduction, thread slipping, and concrete cracking, becoming the optimal matching accessory for SKL, Vossloh, and other mainstream railway fastening systems.

PA6 & PA66 Nylon Material Advantages

PA6 Nylon Dowels

Features excellent fluidity, strong moldability, and good toughness with outstanding low-temperature resistance and impact resistance. Maintains stable mechanical properties in extreme low-temperature environments without brittle cracking. Suitable for conventional railway lines, urban light rails, and subway projects in temperate and frigid regions.

PA66 Nylon Dowels

Upgraded high-specification products with higher molecular density and structural stability. Higher heat resistance, tensile strength, and compressive strength with melting point up to 260°C-300°C. Excellent high-temperature dimensional stability and stronger chemical corrosion resistance. Preferred for heavy-haul railways, high-speed railways, and port industrial railway lines.

Key Structural & Functional Features

Precision Standard Thread Design: Internal thread adopts international railway standard tooth type with precise tooth pitch and depth, ensuring perfect fit with standard rail screw spikes
Anti-Loosening & Anti-Shedding Embedded Structure: Outer wall features special anti-slip groove and convex point design for strong mechanical occlusion with concrete base
Excellent Electrical Insulation Performance: Non-metallic insulating material with insulation resistance ≥1*10¹⁰Ω, effectively isolating current conduction
Superior Environmental Adaptability: Excellent weather resistance, aging resistance, and chemical corrosion resistance with stable performance from -40°C to +120°C
Vibration Damping & Noise Reduction: Good elastic toughness and buffering performance to absorb and disperse vibration energy
Lightweight & Easy Construction: Lightweight design for easy transport, stacking, and installation with simple pre-embedding operation
Durable & Long Service Life: High wear resistance, fatigue resistance, and anti-creep performance withstands millions of cyclic vibrations

Technical Specifications & Customization

Our rail PA6/PA66 nylon dowels comply with international railway industry standards (DIN, NF, AREMA) and support full-size customized production according to customer drawings and samples. Conventional specifications cover all mainstream models of global railway sleeper embedded sleeves.

All products undergo strict factory testing including tensile test, pull-out force test, compression deformation test, insulation resistance test, low-temperature impact test, and aging test. We support third-party authoritative testing (SGS) and provide complete product inspection reports and qualification certificates.

Application Scenarios

This PA6/PA66 nylon rail plastic dowel is widely used in various railway concrete sleeper fastening systems, covering high-speed railway main lines, ordinary speed passenger and freight railways, heavy-haul freight railways, urban subway transit, urban light rail, port and mine industrial railways, highway railway crossings, and other scenarios.

Packaging & Supply Service

We provide professional export-standard packaging using woven bags and wooden pallet integrated packaging, ensuring no damage or deformation during long-distance transportation. With monthly output up to 600 tons, we support bulk wholesale, customized processing, and long-term fixed-point supply with complete technical consultation and after-sales guarantee services.

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Contact Person :	Brian
Tel :	+8618158913783

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