M3x30mm Male-Female Hexagonal Spacer Standoff Metal PCB Mount

Specifications

• Product Type: Male-Female Hexagonal Spacer Standoff
  
• Thread Size: M3 (3.0mm)
  
• Thread Type: Standard Metric Pitch
  
• Standoff Body Length: 30mm
  
• Male Thread Length: ~6mm [Estimated]
  
• Female Thread Depth: ~8mm [Estimated]
  
• Hex Width Across Flats: ~5.5mm [Estimated]
  
• Gender / Configuration: Male-Female
  
• Material: Metal / Brass (Nickel-plated)
  
• Mounting Style: Threaded Fastener Through-Hole Mount
  
• Weight: 0.005 kg [Estimated]
  
• Operating Temperature: -40°C to +120°C
  
• Compatible Hardware: M3 Female Nuts, M3 Screws, M3 Threaded Standoffs, Standard PCB Mounting Holes (3.2mm)

Project Evolution

Unlock New Capabilities

• Past Projects (Prerequisites): If you've already built basic desktop projects on Arduino, Raspberry Pi, or custom PCBs using direct screw mounting or adhesive bumpers, you know how easily loose boards flex, slide around, or short out against metal enclosures. Upgrading to M3x30mm male-female hexagonal metal standoffs is the natural next step for assembling rigid multi-tier PCB stacks, mounting boards securely inside custom enclosures, and constructing durable 3D printer or robotics frames.
• Feature Upgrade (What This Unlocks): This M3x30mm male-female standoff unlocks precise 30mm vertical spacing between stacked circuit boards, sensor plates, and structural chassis panels. Featuring standard M3 metric threading and a hex body for easy wrench tightening, it enables clean, vibration-proof mechanical isolation that prevents accidental electrical shorts and simplifies hardware maintenance.

Effort Level & Minimum Hardware

• Effort Level: Beginner 

Minimum hardware to get started:

• PCB or Chassis with 3.2mm Mounting Holes — standard M3 screws and standoffs require a minimum 3.2mm clearance hole to pass through or thread securely without damaging the board substrate.
  
• M3 Female Nuts or Threaded M3 Board Inserts — necessary to thread onto the male threaded stud end of the standoff to lock it firmly against your mounting plate or lower PCB.
  
• M3 Screws — required to thread into the female socket end of the standoff to secure the upper PCB layer or enclosure panel.

Virtual Technician & Mounting Guide

⚠️ Safety Warnings:

• Overtightening Hazard: Do not over-torque M3 threads into soft materials or thin brass sockets; excessive force can strip the internal threads or snap the male stud.
• Electrical Isolation Warning: Metal standoffs are conductive. Ensure surrounding PCB copper fills around 3.2mm mounting holes have adequate clearance or isolated ground rings to prevent accidental short circuits to adjacent trace lines.
• Thread Engagement: Ensure at least 3 to 4 full thread turns (~3mm depth) are engaged before applying structural loads to prevent thread stripping under vibration.

Package Includes:

1× M3x30mm Male-Female Hexagonal Metal Spacer Standoff 

Frequently Asked Questions

1. What thread size does this male-female standoff use?
   It uses standard metric M3 (3.0mm diameter) coarse threading with standard 0.5mm thread pitch.
2. Will this standoff fit standard Arduino and Raspberry Pi mounting holes?
   Yes, standard Arduino (3.2mm) and Raspberry Pi (2.75mm/3.2mm) mounting holes accept M3 screws and male standoff studs cleanly.
3. Can I stack multiple male-female standoffs together to increase clearance? Yes, the male stud of one standoff threads directly into the female socket of another, allowing modular stacking in 30mm increments.
4. Is this metal standoff electrically conductive?
   Yes, as a metallic/brass component, it conducts electricity and can link ground planes across connected PCB layers.
5. Should I isolate the standoff from live PCB trace lines?
   Yes, maintain adequate clearance around 3.2mm PCB mounting holes to avoid shorting uninsulated traces to ground or chassis.
6. How is this male-female standoff mounted to a base plate or PCB?
   Pass the male threaded stud through the PCB mounting hole and secure it from below using a standard M3 female nut.
7. What tool should I use to tighten the standoff body?
   Use a standard 5.5mm hex nut driver, socket wrench, or small spanner across the flat sides of the hex body.
8. What is the overall length of the standoff excluding the male stud?
   The main body provides 30mm of vertical separation gap between the connected mounting surfaces.
9. What is the length of the male threaded stud?
   The male stud extends approximately 6mm beyond the main body for threading through PCBs up to 3mm thick.
10. How do I prevent the standoff threads from stripping during assembly?
    Hand-tighten first and use a torque limit of under 0.6 Nm to avoid stripping the brass or metal internal threads.
11. What should I do if the standoff vibrates loose in my robot or drone?
    Apply a drop of low-strength blue threadlocker to the M3 male threads before final tightening.
12. Why is the top screw failing to go all the way into the female socket?
    Check for debris inside the socket or ensure the male screw length does not exceed the ~8mm internal thread depth.
13. Are these M3 standoffs quality-inspected at Probots before dispatch?
    Yes, every batch undergoes visual and thread-pitch QC at Probots in Bangalore to ensure clean threading without burrs.
14. Is bulk pricing available for volume manufacturing orders?
    Yes, Probots offers volume discounts for OEM production runs, schools, and robotics research labs.
15. Does Probots supply matching M3 nuts and screws for this standoff?
    Yes, we stock complete M3 hardware sets including stainless steel screws, nuts, and washers in our Bangalore catalog.