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  6. Lightweight, Corrosion-Resistant, Metal Replacement: Glass Fiber Reinforced Plastic (GFRP) Screws (Under Development)

Lightweight, Corrosion-Resistant, Metal Replacement: Glass Fiber Reinforced Plastic (GFRP) Screws (Under Development)

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last updated:Jun 05, 2026

Nitto Boseki Co., Ltd Materials Solution Business Division
Nitto Boseki Co., Ltd Materials Solution Business Division
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Lightweight, high-strength, and rust-proof—GFRP screws overcome the inherent weaknesses of steel fasteners.

Nittobo’s glass fiber reinforced plastic (GFRP) screws are high-performance fastening components made of resin reinforced with long glass fibers. The most significant feature is their overwhelming lightness—less than one-third the weight of metal screws—while achieving superior strength through long-fiber reinforcement. This allows for drastic weight reduction by replacing conventional steel bolts. Functionally, these screws leverage the natural properties of GFRP to provide excellent electrical insulation, enhancing safety in electrical and electronic applications. Being non-metallic, they are completely free from rust and corrosion, ensuring a long service life even in harsh environments exposed to water or chemicals. Furthermore, they eliminate the issue of "galvanic corrosion" typically encountered when joining dissimilar metals, offering a highly reliable joining solution for multi-material designs. From mobility sectors aiming for improved fuel efficiency to infrastructure equipment, this developmental product brings innovation to every single bolt.

    Glass
樹脂ねじ.jpg

Lightweight, Corrosion-Resistant, Metal Replacement: Glass Fiber Reinforced Plastic (GFRP) Screws (Under Development)

樹脂ねじ.jpg
樹脂ねじ.jpg
  • Related Link - https://www.nittobo.co.jp/business/materialssoluti…
  • Special site - Product/service details - https://pr.mono.ipros.com/nittobo/product/

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[Basic Structure] ・Material: Long Glass Fiber Reinforced Plastic (GFRP). ・Manufacturing Process: Optimized alignment of long fibers within the resin to ensure high structural strength. [Key Features] ・Ultra-Lightweight: Less than one-third the weight of conventional metal screws. ・High Strength: Long-fiber reinforcement achieves mechanical strength levels targeted for steel screw replacement. ・Insulation: Non-conductive insulating material. ・Corrosion & Rust Resistance: No rust or corrosion caused by water, salt, or chemicals. [Status] ・This product is currently under development.

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[Mobility Sector] ・Weight Reduction for Vehicles/Aircraft: Reducing total weight by replacing screws and bolts to improve fuel and energy efficiency. ・Track Record: Successfully adopted for an electric motorcycle (powered by 40 AA batteries) at the "Ene-1 MOTEGI GP" in September 2024, completing the race under grueling conditions. [Multi-Material & Industrial Sectors] ・Prevention of Galvanic Corrosion: Solves corrosion issues that occur when joining dissimilar materials, such as aluminum and Carbon Fiber Reinforced Plastic (CFRP). ・Electrical & Electronic Equipment: Ideal for securing circuit boards and battery components where high insulation is required. [Water-Related & Specialized Environments] ・Anti-Rust Solutions: Replacement for metal screws in high-humidity areas, coastal regions, and water treatment facilities where rusting is common. ・Corrosion Resistance: Suitable for chemical plant equipment exposed to acids, alkalis, and other chemicals.

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Glass fiber reinforced resin screw (development product)

Glass fiber reinforced resin screw (development product)

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[Announcement] We will be exhibiting at the "Automotive Technology Exhibition 2026 NAGOYA"!

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We will be exhibiting at the "Automotive Technology Exhibition 2026 NAGOYA" (Booth Number: 312) held at Aichi Sky Expo (Aichi Prefectural International Exhibition Center). At our booth, we will propose our unique fiberglass products and technologies that address the challenges of next-generation mobility development, such as electrification, lightweighting, and multi-materials in automobiles. ■ Main Exhibits ● High-Strength Thin-Walled GFRP → Achieves significant weight reduction and insulation through metal substitution. It also possesses non-combustibility and corrosion resistance, contributing to extended EV range and improved safety. ● Thermoplastic Woven Fabric → Excellent in impregnation and deep drawing during molding, making it ideal for complex shapes required in EV battery peripheral components. ● Dot Coating Technology → Our unique processing technology that enhances molding efficiency through hot melt application while maintaining the inherent breathability and flexibility of the substrate, adding various functions such as deodorization and antibacterial properties. ● Low Dielectric Glass Fabric → Features low dielectric properties (Low Dk/Df) with minimal transmission loss, contributing to improved communication environments and sensing accuracy for ADAS and autonomous driving. We sincerely look forward to your visit.

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[Notice] We will be exhibiting at the "Automotive Technology Exhibition 2026 YOKOHAMA"!

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We will be exhibiting at the "Automotive Engineering Exposition 2026 YOKOHAMA" (Booth No. 299) held at Pacifico Yokohama starting tomorrow. At our booth, we will present our unique fiberglass products that address the challenges of next-generation mobility development, such as electrification, lightweighting, and multi-materialization of automobiles. ■Main Exhibits ● High-Strength Thin GFRP → Achieves significant weight reduction and insulation through metal replacement. It also possesses non-combustibility and corrosion resistance, contributing to extended EV range and improved safety. ● Thermoplastic Woven Fabric → Excellent in impregnation and deep drawing during molding, making it ideal for complex shapes required in EV battery peripheral components. ● Dot Coating Technology → Our unique processing technology that enhances molding efficiency through hot melt application while maintaining the inherent breathability and flexibility of the substrate, adding various functions such as deodorization and antibacterial properties. ● Low Dielectric Glass Fabric → Features low dielectric properties (Low Dk/Df) with minimal transmission loss, contributing to improved communication environments and sensing accuracy for ADAS and autonomous driving. Through these advanced materials, we will support the evolution of next-generation vehicles. We sincerely look forward to your visit.

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Nitto Boseki Co., Ltd Materials Solution Business Division

Glass and clay products

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Nittobo Group: Creating a Healthy and Comfortable Future The Nittobo Group is dedicated to enhancing social value and contributing to a prosperous society. Under our long-term vision, "Big VISION 2030," we strive to be a Global Niche No. 1 provider in "Environment & Energy," "Digitalization," and "Health & Safety." Combining a century of expertise in glass fiber, functional chemicals, and textiles, we serve as the best partner for our customers' product development.

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