Electro Hardware MS1013M01F21D Round Circuit Board Spacer

Product Description

The ELECTRO HARDWARE MS1013M01F21D is a round, female unthreaded circuit board spacer designed for M3 screw applications in PCB mounting assemblies. Machined from brass and finished with a zinc plating that meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, this spacer provides a corrosion-resistant standoff between a circuit board and a mounting surface or stacked board. It measures 7 mm overall length with a 6 mm outside diameter and an inside diameter ranging from 3.2 to 3.6 mm. Electronics assembly technicians and hardware installers use this spacer where precise board separation and a secure mechanical interface are required in metric-fastener assemblies.

This spacer is suited for use in electronic control panels, printed circuit board assemblies, and industrial enclosures where M3 metric hardware is specified. Its round body and standardized metric dimensions make it appropriate for both light commercial and residential electronic equipment assemblies. The zinc-plated brass construction is well suited for indoor environments where moderate corrosion resistance is required alongside good conductivity characteristics.

Key Features

• Female unthreaded design accepts M3 screws for clean PCB standoff mounting
• Brass construction with zinc plating meeting ASTM B633 and QQ-B-626 Comp 22 Type 1
• 7 mm overall length with tight length tolerance of -0.13 to 0.13 mm for consistent board spacing
• 6 mm outside diameter with 3.2 to 3.6 mm inside diameter range
• Round body profile for standard PCB mounting footprints
• Metric system dimensions for compatibility with M3 fastener assemblies

Compatibility

Designed as an OEM-style replacement or standard-fit spacer for PCB assemblies requiring M3 metric screw hardware and a 7 mm standoff height with a 6 mm round body.

Installation Notes

Installation is typically performed by electronics assembly technicians or electricians during board mounting or control panel assembly work. Power down all equipment and discharge any stored energy before servicing circuit boards or enclosures. Use calibrated torque drivers appropriate for M3 fasteners to avoid damaging the unthreaded spacer body. Follow applicable electrical codes and equipment manufacturer guidelines when mounting or replacing PCB hardware.