Electro Hardware MS1005M04F16D Round Board Spacer M3

Product Description

The ELECTRO HARDWARE MS1005M04F16D is a round, female unthreaded circuit board spacer designed to maintain precise standoff distance between a PCB and a mounting surface or secondary board. Manufactured from aluminum grade T3 and conforming to fastener standard QQ-A-225A Comp 2, this spacer delivers consistent dimensional accuracy in tight-tolerance assemblies. It accepts an M3 screw, measures 3 mm overall length, features an inside diameter range of 3.2 to 3.6 mm, and has a 6 mm outside diameter. The bright uncoated finish keeps the aluminum bare, which suits applications where surface treatment is applied after assembly or where electrical continuity through the hardware is required.

This spacer is used in PCB mounting applications across industrial controls, HVAC control boards, electrical enclosures, and similar electronic assemblies where metric hardware is specified. The M3 thread size and compact 3 mm standoff height make it suitable for low-profile board stacking or chassis-mount configurations. Electronics technicians, control board assemblers, and field service technicians installing replacement control boards commonly use hardware of this type when servicing or building metric-fastener assemblies.

Key Features

• Female unthreaded body accepts M3 screws for straightforward PCB mounting
• Aluminum grade T3 construction per QQ-A-225A Comp 2 for consistent material properties
• 3 mm overall length with a tight length tolerance of -0.13 to 0.13 mm
• 6 mm outside diameter with inside diameter range of 3.2 to 3.6 mm
• Bright uncoated finish — no coating to interfere with downstream surface treatments
• Round body shape for standard clearance-hole PCB footprints

Compatibility

Designed as a metric M3 round circuit board spacer for use in PCB assemblies and electronic enclosures requiring a female unthreaded aluminum standoff with a 3 mm overall length and 6 mm outside diameter.

Installation Notes

Installation is performed by electronics technicians or control board service personnel. De-energize all circuits and discharge any capacitors before handling PCBs or installing board hardware. Use appropriately sized M3 fasteners and avoid overtightening, which can deform the aluminum spacer body or crack the PCB substrate. Follow applicable electrical codes and equipment manufacturer guidelines when servicing control boards in HVAC, industrial, or electrical enclosure applications.