Electro Hardware MS1013M04F16F Round Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1013M04F16F is a round, female unthreaded circuit board spacer designed to maintain consistent standoff distance between a PCB and a mounting surface or secondary board. Machined from aluminum grade T3 and left uncoated for a bright finish, it accepts an M4 screw and provides an overall length of 7 mm (approximately 0.276 inches). The inside diameter ranges from 4.2 to 4.8 mm (approximately 0.165 to 0.189 inches) and the outside diameter is 6 mm (approximately 0.236 inches). Electronics assemblers, panel builders, and control board technicians install this spacer when building or servicing HVAC control panels, motor drive assemblies, and similar enclosures that require precise PCB mounting clearance.

This spacer is suited for metric M4 fastener applications in light industrial and commercial electronic assemblies. It is commonly used in control panel fabrication, circuit board mounting frames, and equipment enclosures where aluminum construction keeps weight low and resists corrosion without a coating. The round body shape allows consistent seating against PCB mounting holes, and the unthreaded bore accepts a pass-through M4 screw or bolt without thread engagement in the spacer itself.

Key Features

• Female unthreaded bore accepts M4 screws for straightforward pass-through mounting
• Aluminum grade T3 construction per fastener standard QQ-A-225A Comp 2
• Bright uncoated finish — no added coating thickness to affect fit tolerances
• Overall length of 7 mm (approximately 0.276 inches) with a tight length tolerance of -0.130 to 0.130 mm
• Inside diameter tolerance of 0.000 to 0.270 mm for consistent M4 screw fit
• Round body profile with 6 mm outside diameter for compact panel layouts

Compatibility

Designed as an OEM-style round circuit board spacer for metric M4 screw applications in electronic control assemblies, PCB mounting frames, and industrial panel enclosures.

Installation Notes

Installation is performed by electronics assemblers, panel technicians, and licensed electricians during control board fabrication or replacement. Power down and de-energize all circuits in the enclosure before handling PCBs or installing spacers. Use appropriately sized M4 fastener hardware and apply only hand-tight torque to avoid deforming the unthreaded aluminum bore. Follow applicable NEC guidelines when mounting control boards inside electrical enclosures.