Electro Hardware P309M06F16440 Hex Standoff 4-40 1/2 in

Product Description

The ELECTRO HARDWARE P309M06F16440 is a female hex circuit board standoff designed to create reliable spacing and mounting between PCBs, panels, and enclosure surfaces. Machined from aluminum alloy to material grade T3 and finished to a plain bright uncoated surface, this standoff accepts a 4-40 threaded fastener on the female end with a full 0.5 inch thread depth. The hex body measures 3/16 inch across flats, and the overall length is 0.5 inch. This hardware meets QQ-A-225A Comp 2 fastener standards, making it appropriate for electronics assembly work where dimensional consistency and material certification are required.

This standoff is used in PCB assembly, control board mounting, and electronics enclosure builds across residential and commercial HVAC equipment, industrial control panels, and general electronics manufacturing. Typical applications include separating stacked circuit boards, securing boards to chassis surfaces, and providing a threaded female receiver for machine screws in panel assemblies. The compact 0.5 inch OAL suits low-profile board-to-board or board-to-chassis installations where clearance is limited.

Key Features

• Female threaded hex standoff with 4-40 thread size and 0.5 inch full thread depth
• Aluminum construction, material grade T3, for lightweight corrosion-resistant performance
• Plain bright uncoated finish — ready for use without additional surface treatment
• Hex body profile at 3/16 inch width across flats allows standard wrench or nut driver installation
• Meets QQ-A-225A Comp 2 fastener standard for documented material compliance
• Length tolerance held to plus or minus 0.005 inch for consistent stack height

Compatibility

Designed as a standard 4-40 female hex circuit board standoff suitable for PCB mounting and electronics enclosure assembly applications requiring a 0.5 inch overall length aluminum spacer with plain finish.

Installation Notes

Installation is typically performed by electronics assemblers or control board technicians using a nut driver or small wrench sized to the 3/16 inch hex flats. Always de-energize the assembly and discharge any capacitors before working on circuit boards or control panels. Avoid over-torquing the mating 4-40 screw into the female thread, as aluminum threads can strip under excessive force. Follow applicable workplace and equipment manufacturer guidelines for ESD precautions when handling circuit boards.