Electro Hardware MS1013M01F21F Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1013M01F21F is a round, female unthreaded circuit board spacer designed for M4 screw applications in printed circuit board assemblies. Machined from brass and finished with zinc plating per ASTM B633 and QQ-B-626 Comp 22 Type 1, this spacer provides reliable standoff height and electrical isolation between board layers or between a board and a mounting surface. It measures 7 mm overall length with a 6 mm outside diameter and an inside diameter ranging from 4.2 mm to 4.8 mm. Electronics assembly technicians and electrical contractors use this hardware in control boards, panel assemblies, and industrial enclosures where a secure, corrosion-resistant standoff is required.

This spacer is suited for metric-fastener circuit board assemblies in residential and commercial control panels, HVAC control boards, electrical enclosures, and similar low-voltage electronics applications. Its compact round body and standard M4 thread sizing make it appropriate for production-line PCB builds and field-service board replacements where consistent standoff height and tight length tolerances are critical to proper board fitment and clearance.

Key Features

• Brass body with zinc plating meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards
• Female unthreaded bore accepts M4 screws for secure board mounting
• 7 mm overall length with tight length tolerance of -0.13 mm to 0.13 mm
• 6 mm outside diameter with inside diameter range of 4.2 mm to 4.8 mm
• Round body shape provides consistent standoff and stable board support
• Zinc finish adds corrosion resistance for panel and enclosure environments

Compatibility

Designed as an OEM-style metric spacer for circuit board assemblies using M4 fasteners in control panels, electrical enclosures, and electronics mounting applications.

Installation Notes

Installation is typically performed by electronics assembly technicians or licensed electricians. De-energize all circuits and discharge any capacitors before servicing control boards or panel assemblies. Use calibrated M4 fasteners and a torque-appropriate screwdriver to avoid cracking the board or deforming the spacer. Follow applicable NEC guidelines when working inside energized electrical enclosures.