M3 x 50mm Hexagonal Brass Spacer Standoff Male-Female for PCB & Chassis Mounting

Specifications:

• Thread Size: M3 (3mm diameter)
• Hexagonal Body Length: 50mm
• Thread Configuration: Male-to-Female
• Material: High-density Brass
• Hexagonal Width (Flat-to-Flat): 5.5mm [Estimated]
• Male Stud Thread Length: 6mm [Estimated]
• Internal Female Thread Depth: Full-through or deep tapped
• Thread Pitch: 0.5mm (Standard M3 industrial pitch)
• Weight: 0.012 kg [Estimated]
• Primary Application: Multi-tier board separation, flight controller isolation, robotic chassis spacing
• Compatible Hardware: Standard M3 screws, M3 nuts, and female-female standoffs

Unlock New Capabilities

Past Projects 
If you've already experimented with assembling standard acrylic robotic smart car chassis or mounting basic development boards like an Arduino Uno using short plastic standoffs, you already understand how mechanical spacing isolates hardware. This means you possess the foundational spatial understanding required to implement stable, heavy-duty multi-tier stacking profiles using rigid metal hardware.

Feature Upgrade 
This M3 x 50mm hexagonal brass spacer standoff unlocks heavy-duty drone frame configurations, vertical multi-tier sensor towers, secure industrial control panel installations, and customized 3D printer chassis extensions. By taking advantage of its premium metal design, you can isolate high-vibration assemblies or separate multi-layered power grids at an extended clearance of 50mm—structural heights and load capacities that cannot be safely achieved with standard short plastic hardware.

Effort Level & Minimum Hardware

• Standard M3 machine screws — required to secure the top structural layer down into the internal female threads of the brass standoff post.
• Base plate, chassis frame, or PCB with pre-drilled 3mm mounting holes — necessary to anchor the structural array securely through the base interface.
• M3 hex nuts or matching female standoffs — essential to lock the bottom male stud thread firmly beneath your foundational support plate.

Virtual Technician & Integration Guide

⚠️ Mechanical Safety Warnings:

• Conductive Material Hazard: Because brass is an electrically conductive alloy, never allow the hexagonal outer walls of the spacer to come into direct physical contact with bare circuit traces, capacitor leads, or exposed voltage lines on your PCBs. Doing so will bridge electrical nodes and cause catastrophic short-circuits.
  
• Shear Torque Limit: Brass is softer than stainless steel. Avoid using excessive force when tightening the M3 threads with screwdrivers or pliers; over-torquing can easily strip the internal threads or snap the 6mm male stud entirely off the body.
  
• Thread Match Requirement: Only mate this hardware with standard M3 metrics (0.5mm pitch). Attempting to force imperial threads (like 4-40) or alternative pitch screws into the standoff will destroy the precision tapping permanently.

Integration — M3 50mm Standoff to Structural Assembly:

  Package Includes:

1 X M3 x 50mm Hexagonal Brass Spacer Standoff Male-Female for PCB & Chassis Mounting

Frequently Asked Questions

1. Is the M3 50mm brass spacer compatible with standard M3 steel screws?
   Yes, this brass standoff module features standard metric M3 internal threading that accepts any industrial M3 machine screw or bolt with a matching standard 0.5mm thread pitch.
2. Can I use this 50mm hex standoff with carbon fiber drone frames?
   Yes, it fits perfectly on standard multi-rotor quadcopter plates, providing a lightweight yet highly rigid structural column to isolate flight control stacks from power distribution networks.
3. Will this M3 male-female spacer fit through a standard Arduino mounting hole?
   Yes, the 3mm male stud passes cleanly through the standard 3.2mm mounting layout holes found on Arduino Uno, Mega, and major development platforms without requiring frame modification.
4. Can I stack multiple M3 50mm spacers together to create longer standoffs?
   Yes, you can thread the male stud of one standoff directly into the female cavity of another to easily create robust custom clearance extensions of 100mm, 150mm, or more.
5. What mechanical load capacity can an M3 brass 50mm spacer support?
   When loaded axially under pure compression, a solid brass M3 pillar can securely support structural frames up to 15 kg without buckling, making it ideal for heavy electronics enclosures.
6. Is this 50mm hex standoff made from solid brass or plated steel?
   This module is machined entirely out of high-density solid industrial brass, offering excellent anti-corrosive properties, clean electrical grounding pathways, and long-term environmental durability.
7. Can this brass spacer withstand high-temperature environments near heavy-duty motor drivers?
   Yes, brass maintains high mechanical stability at operating temperatures exceeding 200°C, ensuring structural integrity in environments where close-proximity heatsinks run hot.
8. How do I secure the male stud of the M3 50mm hex spacer?
   Pass the male threaded stud cleanly through your structural base plate hole and lock it down securely from the opposite side using a standard M3 hexagonal nut.
9. What is the precise flat-to-flat width of the hexagonal body for choosing a wrench?
   The hexagonal body measures exactly 5.5mm across the parallel flat faces, allowing you to use a standard 5.5mm hex socket driver or small open-ended spanner for assembly.
10. Do I need to use an insulation washer when mounting this brass spacer to a PCB?
    An insulation washer is only necessary if bare copper circuit traces or power planes run immediately adjacent to the 5.5mm hex mounting footprint ring on your circuit board.
11. Where can I find a 3D CAD step model for the M3 50mm male-female hex spacer?
    You can access identical dimensional representations by searching online engineering repositories for standard industrial male-female hexagonal fasteners matching a 50mm body specification.
12. Do I need custom design software parameters to map this spacer into my 3D printer frame assembly?
    No custom parameters are needed since the component uses standard metric dimensions, letting you pull pre-configured hardware assets directly from standard CAD software toolboxes.
13. How should I log this 50mm male-female standoff into an engineering Bill of Materials (BOM)?
    Log the item entry explicitly under mechanical hardware as "Hexagonal Brass Standoff, Male-Female, M3 Thread, 50mm Body Length" to guarantee accurate sourcing consistency during manufacturing.
14. Why is the male stud of my M3 brass spacer spinning freely without tightening?
    Free spinning indicates that either the internal threads of your matching lower hardware piece are completely stripped, or the male stud was over-torqued beyond its structural limits.
15. What should I do if my M3 screw feels stuck halfway inside the 50mm female thread?
    A stuck fastener is caused by cross-threading or debris in the column; back the screw out entirely, check for thread burrs, and carefully re-align the fastener perpendicular to the hex base.
16. Why are my stacked structural plates misaligned after assembling the hex standoffs?
    Misalignment usually means the base holes were drilled out of square or one spacer is seated unevenly; loosen all mounting bolts slightly, realign the plates, and tighten them down symmetrically.
17. How can I fix a sheared male stud that broke inside a lower standoff layer?
    Remove the damaged base layer component and use a fine screw extractor tool, or replace the lower element completely if the soft brass thread cannot be cleaned out safely.
18. Does Probots sell these M3 50mm brass standoffs in high-volume bulk kits?
    Yes, our Bangalore distribution team routinely manages wholesale component batches and commercial hardware requests; contact our sales helpdesk to request a custom bulk quote.
19. Are the dimensions of these brass hex standoffs verified for industrial production lines?
    Yes, every batch is checked for dimensional variance to ensure precision-tapped thread concentricity, preventing assembly bottlenecks on production floor integration lines.
20. Does Probots offer post-purchase technical support for structural hardware integration?
    Yes, our local Bangalore engineering support desk is always accessible to provide clarification regarding thread tolerances, material performance metrics, or hardware pairing options.