Motorcycle Windshield Rubber Expansion Well Nut Fasteners 10-Piece Kit with Brass Nut Core

This 10-piece motorcycle hardware set provides a practical fastening solution specifically suited to windshield and panel installation projects where vibration resistance is key. Combining a brass internal nut with a rubber expansion sleeve, these riveting fasteners create a firm, long-lasting hold that helps prevent loosening from road vibrations. The kit includes three common metric thread sizes – M4, M5, and M6 – in a universal black finish, offering versatility for various modification and repair tasks. Each fastener is designed to be installed into pre-drilled holes, where the rubber sleeve expands during riveting to create a secure grip against the panel material.

Features and Construction

The design of these fasteners addresses common issues with vibration-induced loosening in motorcycle applications. By combining materials with different properties, they offer both holding power and some dampening effect.

Material and Build

Each fastener consists of two main components: an outer rubber expansion sleeve and an internal brass nut. The rubber sleeve provides the compression grip against the mounting hole walls when installed, while the brass nut offers a durable threaded core for bolt engagement. This combination allows for secure fastening without requiring access to the back of the panel, making them ideal for enclosed spaces or finished surfaces where traditional nuts cannot be used.

Size and Practical Fit

The kit includes three distinct specifications to cover common thread sizes. The G388150 variant is an M4 thread with an 11mm diameter rubber body. The G388151 is an M5 thread with a 12mm diameter. The G388152 is an M6 thread with dimensions of 13mm by 13.6mm. The varying sizes accommodate different bolt diameters and panel thicknesses, providing flexibility for motorcycle windshield mounting and other panel attachment scenarios.

Uses and Placement

These fasteners are designed primarily for automotive and motorcycle applications where vibration is a constant factor and where traditional bolt-and-nut combinations may prove inadequate over time.

Event or Professional Use

For motorcycle modification projects, these fasteners offer a reliable mounting solution for windshields, fairings, and other plastic or composite panels. Their vibration-resistant design makes them suitable for professional repair work or custom builds where secure attachment is critical. The mixed thread sizes in the kit mean mechanics and modifiers can address various mounting points without needing multiple product packages.

Everyday Home Use

Beyond motorcycle applications, these well nuts can be used for securing panels on other vehicles, mounting accessories in enclosures, or any project requiring a blind fastener that resists vibration. The 10-piece quantity provides enough fasteners for multiple small projects or a single larger installation with spares remaining.

Benefits and Buying Value

The value of this hardware set lies in its specialised design for vibration-prone environments and the convenience of having multiple thread sizes in one package.

Reuse and Low Maintenance

Once installed, these fasteners typically remain in place until deliberately removed. The brass nut resists corrosion that could seize threads, while the rubber sleeve maintains its compression grip. For maintenance access, they can generally be removed by unscrewing the bolt and extracting the fastener, though the rubber may need replacement if damaged during removal.

Why Choose This Product

This kit offers a targeted solution for motorcycle owners and modifiers needing to securely mount windshields and panels. The inclusion of three thread sizes in one package saves time and cost compared to purchasing separate packs, while the brass-and-rubber construction addresses the specific challenge of vibration loosening. The 10-piece count provides practical coverage for most windshield installations with spare fasteners for future use.