Motorcycle Modified Windshield Rubber Brass Nut Expansion Fasteners with Three Thread Sizes

These black rubber expansion nuts with brass threaded inserts provide a practical fastening solution for motorcycle windshields and similar modifications where vibration resistance and secure mounting are essential. The combination of flexible rubber and durable brass creates fasteners that compress during installation, forming a tight seal that helps prevent loosening from engine vibrations and road movement. With three standard metric thread sizes included in the set—M4, M5, and M6—these well nuts offer versatility for various mounting requirements, from windshield installations to other motorcycle accessory fittings. The ten-piece package provides sufficient quantity for multiple mounting points across different applications.

Features and Construction

The rubber brass nut fasteners feature a straightforward yet effective design that combines two materials for optimal performance in motorcycle applications. Each nut consists of a black rubber exterior body that compresses during installation and an embedded brass threaded insert that provides durable thread engagement for mounting bolts. This construction creates fasteners that resist vibration-induced loosening while maintaining a secure connection point.

Material and Build

Each expansion nut combines a black rubber exterior with an embedded brass threaded insert at its centre. The rubber body compresses when a bolt is tightened through the brass insert, causing the rubber to expand outward and create a tight seal against the mounting surface. This compression-based fastening method helps distribute pressure evenly and creates vibration-dampening properties that can be particularly useful in motorcycle applications where engine and road vibrations are constant factors.

Size and Practical Fit

The set includes three specific size options to accommodate different mounting requirements. The M4 thread size features an 11mm diameter rubber body, the M5 thread size has a 12mm diameter body, and the M6 thread size measures 13.6mm in diameter. These metric sizes correspond to standard motorcycle hardware and allow for compatibility with various bolt diameters commonly used in windshield installations and other modifications. The ten-piece total quantity provides flexibility for projects requiring multiple mounting points.

Uses and Placement

These rubber brass expansion nuts serve primarily as fastening solutions for motorcycle modifications, with windshield mounting being a key application. Their vibration-resistant properties make them suitable for areas subject to constant movement, while their waterproof sealing capability helps protect mounting points from moisture exposure during riding.

Event or Professional Use

For motorcycle workshops or modification specialists, these well nuts offer a reliable fastening option for installing aftermarket windshields, fairings, or other accessories that require secure yet vibration-resistant mounting. The three included thread sizes—M4, M5, and M6—cover most common metric fastener requirements in motorcycle applications, making them versatile for various projects without needing multiple separate products. The black colour provides a discreet appearance that blends with many motorcycle components.

Everyday Home Use

For motorcycle owners performing their own modifications or repairs, these expansion nuts simplify the process of creating secure mounting points for windshields and accessories. The compression-based installation requires only a correctly sized drilled hole and appropriate tightening torque, without specialised tools beyond standard workshop equipment. The ten-piece quantity allows for multiple mounting points or provides spares for future projects, offering practical value for home mechanics.

Benefits and Buying Value

These rubber brass nut fasteners provide practical advantages for motorcycle modifications through their combination of materials, size options, and vibration-resistant design. Their value comes from offering multiple thread sizes in one package and a construction method that addresses common fastening challenges in motorcycle applications.

Reuse and Low Maintenance

The rubber and brass construction allows for removal and reinstallation if needed, though the compression-based design works most effectively with initial proper installation. Their vibration-resistant properties help maintain tightness over time, potentially reducing the need for periodic retightening that some fasteners require in motorcycle applications. The brass threaded inserts maintain their thread integrity through multiple installation cycles when handled properly.

Why Choose This Product

This set of expansion nuts offers a practical solution for motorcycle owners and workshops needing reliable fasteners for windshield installations and similar modifications. The inclusion of three common metric thread sizes in one package provides versatility for various projects, while the ten-piece quantity ensures sufficient fasteners for multiple mounting points. The combination of rubber compression and brass threading addresses both vibration resistance and durable thread engagement, two important factors in motorcycle fastening applications where movement and exposure are constant considerations.