Electro Hardware MS1047M04F16F Round Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1047M04F16F is a round, female unthreaded circuit board spacer designed to maintain precise standoff distances between PCBs and mounting surfaces in electronic assemblies. Machined from Aluminum Grade T3 and finished bright uncoated, this spacer meets the QQ-A-225A Comp 2 fastener standard. It accepts an M4 screw, measures 0.945 inches overall length, and has an outside diameter of 0.236 inches with an inside diameter range of 0.165 to 0.189 inches. The lightweight aluminum construction keeps added mass minimal at approximately 0.004 pounds per piece, making it well suited for density-sensitive board layouts.

This spacer is used in commercial electronics assembly, control panel fabrication, and industrial PCB mounting applications. Electricians, electronics technicians, and control panel builders install these spacers when securing circuit boards to enclosures, DIN-rail mounted assemblies, or chassis panels where consistent standoff height and precise hole alignment are required. The metric M4 thread size fits standard metric PCB mounting hole patterns common in industrial and OEM equipment builds.

Key Features

• Female unthreaded body accepts M4 screw for secure PCB standoff mounting
• Aluminum Grade T3 construction per QQ-A-225A Comp 2 fastener standard
• Bright uncoated finish resists interference with sensitive electronic assemblies
• Inside diameter tolerance of 0.000 to 0.270 mm provides reliable M4 fastener fit
• Length tolerance of -0.130 to 0.130 mm ensures consistent standoff height across multiple mounting points
• Round body shape for uniform load distribution against PCB surfaces

Compatibility

Designed as a metric M4 female unthreaded round spacer for use in PCB and circuit board mounting assemblies requiring a 24 mm standoff with a 6 mm outside diameter body.

Installation Notes

Installation is performed by electronics technicians or electricians working on control panels and PCB assemblies. De-energize all circuits and discharge any stored energy before handling boards or installing spacers. Use appropriate metric M4 fasteners and a calibrated torque driver to avoid over-compression of the spacer body against the board surface. Follow IPC assembly standards and applicable NEC requirements when installing spacers inside electrical enclosures.