Electro Hardware MS1017M01F21F Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1017M01F21F is a round, female unthreaded circuit board spacer designed to provide precise standoff spacing between a PCB and a mounting surface or adjacent board. Machined from brass and finished with a zinc plating per ASTM B633 and QQ-B-626 Comp 22 Type 1, this spacer delivers corrosion resistance alongside the dimensional consistency required in electronics assembly and control board installations. The spacer measures 9 mm overall length, with an outside diameter of 6 mm and an inside diameter ranging from 4.2 to 4.8 mm, sized for M4 hardware. It is installed by electronics technicians, automation integrators, and HVAC or electrical control-panel assemblers.

This spacer is suited for use in control panel assemblies, PCB mounting applications, and electronic enclosures where repeatable standoff height and secure board positioning are required. The metric sizing and female unthreaded design make it appropriate for a wide range of light commercial and industrial electronic assembly environments. Installers working with M4 fastener systems will find the dimensional tolerances consistent with precision board-mounting requirements.

Key Features

• Female unthreaded design accepts M4 screw hardware for straightforward PCB standoff assembly
• Brass construction with zinc plating per ASTM B633 and QQ-B-626 Comp 22 Type 1 for corrosion resistance
• 9 mm overall length with a tight length tolerance of -0.13 to 0.13 mm for consistent standoff height
• 6 mm outside diameter and 4.2 to 4.8 mm inside diameter with inside diameter tolerance of 0.000 to 0.270 mm
• Round body shape for uniform load distribution on PCB mounting points
• Metric dimensioning for compatibility with M4 fastener systems

Compatibility

Designed as a standard metric M4 circuit board spacer suitable for PCB standoff applications requiring a female unthreaded round spacer with a 9 mm overall length and 6 mm outside diameter.

Installation Notes

Installation is performed by electronics technicians or control-panel assemblers using standard hand tools. Power down and de-energize any circuit board assembly fully before installing or replacing spacers. Do not overtighten M4 fasteners through the spacer bore, as brass is subject to deformation under excessive clamping force. Follow applicable assembly standards and IPC guidelines for PCB mounting hardware installation.