M3 Bolts and Nuts — Essential Fastening Hardware for Electronics

M3 bolts and nuts are the go-to fasteners for electronics prototyping, PCB mounting, and 3D printed enclosures. With a 3mm diameter and standard 0.5mm thread pitch, they provide a reliable hold without excessive bulk. This set includes assorted lengths and matching hex nuts, making it perfect for everything from sensor modules to robotics frames.

Key Specifications

What You Can Build With This

• Securely mount Arduino, Raspberry Pi, and other development boards into enclosures
• Assemble custom 3D printed cases for IoT sensors and controllers
• Create sturdy PCB stack-ups with M3 standoffs for multi-board projects
• Build robotics frames and brackets that require reliable, vibration-resistant fastening

Compatibility

These bolts fit standard M3 clearance holes found on most microcontrollers, single-board computers, and expansion shields. They pair well with M3 standoffs (hex or round) and are compatible with common prototyping materials like acrylic, plywood, and 3D printed PLA/ABS. Voltage and signal insulation is not affected, as they are purely mechanical.

Wiring Notes

When fastening near PCB traces, slide a nylon washer under the bolt head to prevent accidental shorts. Always finger-tighten before final torque to avoid stripping threads—M3 threads are fine and can be damaged by overtightening, especially in plastic housings.

Why Buy from Compoden

Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.