Electro Hardware P577M06F16-440 Female Hex Standoff 4-40

Product Description

The ELECTRO HARDWARE P577M06F16-440 is a female hex circuit board standoff designed to create fixed spacing between PCBs, panels, or enclosure surfaces. Machined from aluminum with an anodized bright finish, this standoff meets the QQ-A-225A Comp 2 material standard and is manufactured to a T-3 material grade. The 4-40 female thread accepts a standard 4-40 screw on both ends, allowing secure board stacking or chassis mounting. The hex body measures 0.25 inches across flats, making it compatible with standard hex drivers and nutdrivers. Overall length is 1.25 inches with a length tolerance of -0.005 to 0.005 inches, suitable for precision PCB assemblies.

This standoff is used in residential and commercial electronic assemblies, control panel builds, HVAC control boards, and industrial enclosures wherever consistent, rigid PCB standoff spacing is required. Electronics technicians, control panel fabricators, and field service techs working on board-level repairs and chassis assemblies are the typical installers. The hex body profile allows for easy torquing with a nutdriver or wrench during assembly or field replacement.

Key Features

• Female 4-40 threaded through-body accepts standard 4-40 screws for secure PCB mounting
• Hex body shape at 0.25 inches across flats allows tool-assisted tightening
• 1.25-inch overall length provides consistent standoff spacing in multi-board assemblies
• Aluminum construction with anodized bright finish resists corrosion and wear
• Meets QQ-A-225A Comp 2 fastener standard at T-3 material grade
• Tight length tolerance of plus or minus 0.005 inches ensures precision fitment

Compatibility

Designed as a standard 4-40 female hex circuit board standoff for use in PCB assemblies, control panels, and electronic enclosures requiring inch-system fasteners.

Installation Notes

Installation should be performed by a qualified electronics technician or control panel assembler. Always de-energize and discharge the circuit board assembly before installing or removing standoffs. Use a properly sized hex nutdriver to seat the standoff without over-torquing, which can strip the aluminum threads or crack the PCB. Verify thread engagement depth is sufficient before applying full clamping load to the board.