Electro Hardware MS1037M01F21F Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1037M01F21F is a round, female unthreaded circuit board spacer designed to create precise standoff clearance between a PCB and a mounting surface. It accepts an M4 screw and measures 19 mm overall length with an outside diameter of 6 mm and an inside diameter ranging from 4.2 to 4.8 mm. The body is machined from brass and finished with zinc plating per ASTM B633 and QQ-B-626 Comp 22 Type 1, providing corrosion resistance in standard indoor electronic assemblies. Electronics assemblers and field technicians working with control boards, variable frequency drives, and similar equipment install these spacers during board mounting and replacement.

This spacer is used in residential and commercial electronic control assemblies where metric M4 hardware is specified. Typical applications include circuit board standoff installations inside HVAC control panels, electrical enclosures, and industrial equipment chassis. The metric sizing makes it appropriate for OEM-spec assemblies and repair work requiring dimensional consistency. Its round body shape seats flush in standard clearance holes, and the zinc finish is suitable for dry or low-humidity enclosures.

Key Features

• Female unthreaded body accepts M4 metric screw for versatile mounting
• 19 mm overall length with a tight length tolerance of -0.130 to 0.130 mm
• 6 mm outside diameter with inside diameter of 4.2 to 4.8 mm
• Brass construction with zinc plating per ASTM B633 and QQ-B-626 Comp 22 Type 1
• Round body shape for consistent seating in standard PCB clearance holes
• Metric system of measurement for OEM-compatible installations

Compatibility

Designed as an OEM-style metric circuit board spacer for use in electronic assemblies, control panels, and enclosures requiring M4 screw hardware and a 6 mm outside diameter standoff.

Installation Notes

Install and remove these spacers using appropriate metric hand tools. Power down all equipment and discharge any stored energy in the circuit board assembly before handling PCBs or related hardware. Follow applicable electrical codes and manufacturer guidelines for board mounting torque and clearance requirements. Do not overtighten fasteners, as brass hardware can be damaged by excessive force.