Electro Hardware P545M06F16-440 Hex Standoff 4-40 3/4 Inch

Product Description

The ELECTRO HARDWARE P545M06F16-440 is a female hex circuit board standoff machined from aluminum with an anodized bright finish. It accepts a 4-40 thread and measures 0.75 inches overall length with a 0.25-inch width across flats on a hex body profile. Standoffs of this type are used to create a fixed, electrically isolated gap between a PCB and a chassis or between stacked boards. The material grade is T-3 aluminum, and the part conforms to the QQ-A-225A Comp 2 fastener standard. Installation is typically performed by electronics technicians, panel builders, and field service technicians working on control boards in HVAC, electrical, and industrial equipment enclosures.

This standoff is suited for use in control panel assemblies, PCB mounting applications, and equipment enclosures where a lightweight, corrosion-resistant spacer is required. It is appropriate for both residential and light commercial equipment applications, including control board mounting in HVAC equipment, electrical panels, and other enclosures where 4-40 threaded fasteners are specified. The hex body allows for wrench engagement during installation, providing precise torque control without spinning.

Key Features

• Female 4-40 threaded interior for standard PCB mounting hardware
• 0.75-inch overall length provides consistent board standoff height
• 0.25-inch hex body width across flats allows wrench or nut driver engagement
• T-3 aluminum construction keeps weight low while maintaining structural integrity
• Anodized bright finish provides corrosion resistance in enclosed environments
• Conforms to QQ-A-225A Comp 2 fastener standard for verified material quality

Compatibility

Designed as an OEM-style replacement or new-installation standoff for any circuit board assembly using 4-40 threaded hardware and requiring a 0.75-inch standoff height with a hex body profile.

Installation Notes

Installation is performed by electronics technicians or qualified trade professionals during control board assembly or replacement. Power down all equipment and discharge any capacitors before working on PCB assemblies. A nut driver or small wrench sized to 0.25 inches across flats should be used to seat the standoff without overdriving. Follow the equipment manufacturer's torque guidance and applicable electrical codes when mounting control boards in enclosures.