Electro Hardware MS1043M04F16F Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1043M04F16F is a round, female unthreaded aluminum circuit board spacer designed to create precise standoff clearance between a PCB and a mounting surface or secondary board. It accepts an M4 screw, measures 22 mm overall length, and carries a 6 mm outside diameter with an inside diameter ranging from 4.2 mm to 4.8 mm. The body is machined from Aluminum Grade T3 to the QQ-A-225A Comp 2 fastener standard and is supplied with a bright, uncoated finish. Electronics assemblers, field service technicians, and board-level repair professionals install this spacer wherever a lightweight, corrosion-resistant standoff is required in control panels, drive enclosures, or circuit board assemblies.

This spacer is suited for metric fastener applications in residential and light commercial electronics assemblies, HVAC control board mounting, and industrial panel builds where M4 hardware is the specified screw size. The round body and female unthreaded bore allow a through-bolt or machine screw to pass and clamp without thread engagement in the spacer itself, giving assemblers flexibility in fastener selection. The aluminum construction keeps overall weight low while maintaining adequate compressive strength for board-clamping loads.

Key Features

• Female unthreaded bore accepts M4 screws for flexible fastener pairing
• 22 mm overall length with a tight length tolerance of -0.130 mm to 0.130 mm for consistent board standoff height
• 6 mm outside diameter with inside diameter range of 4.2 mm to 4.8 mm (0.000 mm to 0.270 mm ID tolerance)
• Aluminum Grade T3 construction per QQ-A-225A Comp 2 for lightweight, corrosion-resistant performance
• Bright, uncoated finish — no coating thickness to account for in tight-clearance installations
• Round body shape provides even load distribution around the fastener bore

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board assemblies requiring M4 metric fastener hardware and a 22 mm standoff height.

Installation Notes

Installation is performed by electronics assemblers or qualified technicians during board mounting or board replacement. Always power down and de-energize the equipment fully before handling or repositioning circuit boards. Use calibrated torque drivers appropriate for M4 hardware to avoid cracking the PCB substrate or deforming the spacer bore. Confirm the mating screw length accounts for the full 22 mm spacer height plus any PCB and washer stack thickness before final assembly.