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A fiberglass threaded rod is a continuous, fully threaded fastening element made from glass fiber reinforced polymer (FRP). Unlike steel threaded rods, fiberglass rods do not rely on metallic strength or surface coatings to achieve durability.
They are commonly used where traditional metal fasteners face limitations due to:
Corrosion
Electrical conductivity
Chemical exposure
Weight restrictions
Fiberglass threaded rods are typically used as tie rods, anchor rods, and fastening components in industrial and infrastructure applications.
Fiberglass threaded rods are commonly produced with standard thread forms such as:
Metric threads
Unified threads (UNC / UNF)
Thread geometry is designed to balance load transfer and material integrity, ensuring reliable engagement with composite or compatible nuts.
Most fiberglass threaded rods are manufactured using pultrusion combined with secondary threading processes or molded thread formation.
Key manufacturing characteristics include:
Continuous fiber alignment along the rod axis
Uniform cross-section and thread consistency
Controlled fiber-to-resin ratio
This process ensures predictable mechanical behavior along the full length of the rod.
Material selection directly affects performance in service environments.
High-strength E-glass fibers are typically used to provide tensile strength and stiffness. Fiber orientation is primarily longitudinal to support axial load transfer.
Common resin systems include:
Vinyl ester: Enhanced chemical and corrosion resistance
Epoxy: Higher mechanical performance and thermal stability
Polyester: General industrial applications
Resin choice is driven primarily by environmental exposure rather than load capacity alone.
Fiberglass threaded rods are available in a wide range of standard sizes.
Typical options include:
Diameter range: M6 to M36 (or equivalent inch sizes)
Standard lengths: 1 m, 2 m, 3 m
Custom lengths available upon request
Cut-to-length options are commonly provided to reduce on-site machining and installation time.
Fiberglass threaded rods provide a balanced combination of mechanical properties suitable for many fastening applications.
Typical characteristics include:
High tensile strength relative to weight
Excellent corrosion resistance
Electrical and thermal insulation
Non-magnetic behavior
Unlike steel rods, fiberglass rods do not yield plastically. Design is typically governed by allowable stress and safety factors appropriate for composite materials.
Fiberglass threaded rods are often used with compatible non-metallic accessories to maintain system performance.
Common accessories include:
Fiberglass or composite nuts
Flat and load-distributing washers
Insulating sleeves and spacers
Using matched accessories ensures consistent load transfer and avoids galvanic or electrical issues associated with mixed materials.
Yes. They are designed for axial load applications within defined limits.
No. Corrosion resistance is inherent to the material.
Yes. They provide electrical insulation and are non-conductive.
Yes. Metric and inch thread profiles are commonly offered.
In many corrosive or non-conductive applications, yes.
Maintenance requirements are minimal compared to steel fasteners.
Fiberglass threaded rods provide a reliable fastening solution for environments where corrosion resistance, electrical insulation, and long-term durability are required. By combining engineered glass fiber reinforcement with appropriate resin systems, they deliver predictable mechanical performance without the limitations of metallic fasteners. For industrial and infrastructure projects requiring stable, non-metallic fastening systems, fiberglass threaded rods offer a practical and technically sound option.
