DFRobot - M3x20 Low Profile Hex Head Cap Screw Set (10 Sets)

M3 Hex Head Cap Screw Set (20mm) provides a reliable fastening solution for electronics assemblies, robotics frames, and mechanical prototyping projects. The hardware kit includes precision M3 fasteners paired with matching nuts, enabling stable mounting of circuit boards, sensors, brackets, and structural components. A hex-drive head design improves torque transfer and reduces stripping during installation. The 20 mm screw length offers suitable clearance for stacked boards, spacers, and layered mechanical structures commonly found in maker builds, engineering prototypes, and educational platforms.

Hex Drive for Secure Torque Application

A hex-drive head enables stronger and more controlled tightening compared with common cross or slotted screws. This hex head cap fastener style supports the use of standard hex tools, delivering improved torque transfer and minimizing cam-out during assembly. Reliable fastening performance benefits electronics mounting tasks where vibration, repeated adjustments, or mechanical stress may loosen weaker fasteners.

Standard M3 Hardware for Electronics and Robotics

The metric M3 screw format represents one of the most widely used standards in electronics enclosures, sensor modules, and development boards. Compatibility with common standoffs, brackets, and chassis plates simplifies integration into robotics frames and prototyping structures. The included M3 nuts allow immediate installation without sourcing additional hardware, streamlining mechanical assembly for laboratory builds and engineering prototypes.

20 mm Length for Multi‑Layer Mounting

A 20 mm screw length provides flexibility when securing stacked components such as controller boards, shields, sensor mounts, and structural plates. Additional length accommodates spacers, acrylic panels, or aluminum brackets often used in robotics and mechanical experimentation. This configuration supports both simple board mounting and more complex multi-layer assemblies.

This mechanical fastener kit supports a wide range of applications including circuit board installation, sensor mounting, robotics chassis assembly, and structural prototyping. Standardized M3 hardware makes the screw set suitable for electronics laboratories, maker workshops, engineering development benches, and STEM learning environments.

• M3 hex head cap screw design for secure tightening
• 20 mm screw length suitable for stacked assemblies
• Standard metric M3 threading compatible with common electronics hardware
• Includes matching M3 nuts for convenient installation
• Suitable for circuit boards, sensors, brackets, and mechanical structures

• Circuit board mounting
• Sensor module installation
• Robotics chassis assembly
• Mechanical prototyping
• Educational electronics projects

• Screw Drive Type: Hex
• Screw size: M3
• Screw length: 20 mm (0.79")

• M3X20 screws x10
• M3 nuts x10