M3 × 20 mm Brass Standoff Spacer (Female–Female)

The M3 × 20 mm Brass Standoff Spacer (Female–Female) is a precision fastener used to create a rigid, accurate gap between two parts in mechanical and electronic assemblies. With internal M3 threads on both ends and a 20 mm body length, this spacer is ideal for mounting PCBs, stacking modules, and building robust microcontroller projects based on Arduino or other development boards. Crafted from solid brass, it combines strength, dimensional stability, and corrosion resistance for long-term reliability.

✅ Key Features

• Female–Female M3 threads for quick, secure fastening with standard M3 machine screws.
• 20 mm spacing provides consistent clearance for components, airflow, and cable routing.
• Solid brass construction for excellent strength, durability, and corrosion resistance.
• Electrically conductive material enables intentional grounding or chassis bonding when required.
• Precision alignment keeps PCBs, panels, and subassemblies square and stable during assembly and service.
• Great for electronics components, modules, sensor boards, and prototyping with microcontrollers.

🧰 Typical Applications

• PCB mounting and board-to-board stacking (e.g., shields, add-on boards, and modules).
• Enclosures and panels in instruments, test fixtures, and control cabinets.
• Prototyping with Arduino-based systems and general-purpose development boards.
• Maintaining clearance for connectors, heat sinks, and safe creepage distances in higher voltage areas. For true electrical isolation, use nylon standoffs or insulating washers.

📐 Specifications

• Thread Size: M3 (internal, both ends)
• Body Length: 20 mm
• Gender: Female–Female
• Material: Brass
• Use With: M3 machine screws and compatible hardware

🧩 Variants and Form Factors

Brass standoffs are available in various shapes and sizes to suit different builds, including hex, round, and square bodies, multiple lengths, and thread combinations (female–female, male–female, male–male). For boards like Raspberry Pi that commonly use M2.5 hardware, select the appropriate thread size or adapters.

🔧 Compatibility Notes

• Works with standard M3 screws; choose screw length to accommodate PCB thickness, panel depth, and washer use.
• Because brass is conductive, do not rely on this spacer for electrical insulation—use insulating hardware if isolation is required.

⚙️ Engineering Benefits

• Corrosion resistance for long service life in varied environments.
• Mechanical versatility for enclosures, fixtures, and modular assemblies.
• Stable, repeatable spacing that enhances serviceability and system reliability.

Whether you are integrating electronics components into a custom chassis or stacking modules in a compact microcontroller system, this M3 × 20 mm brass standoff spacer delivers clean, professional results with dependable mechanical performance.