Electro Hardware ESO-6440-6ZI Hex Board Standoff 4-40

Product Description

The ELECTRO HARDWARE ESO-6440-6ZI is a female hex circuit board standoff designed to create precise spacing between PCBs and mounting surfaces in electronic assemblies. Threaded at 4-40, this standoff accepts a mating male fastener on one end and self-clinches into a through hole on the panel or board. The hex body measures 0.25 inches across flats and the overall length is 0.187 inches. Constructed from steel with a zinc-plated finish, it resists corrosion and provides reliable conductivity grounding paths in control boards and electrical enclosures. Licensed electricians, panel builders, and electronics technicians install these during board assembly or service.

This standoff is suited for residential and commercial control panel applications, electronic enclosure builds, and PCB stacking configurations where consistent board-to-board or board-to-chassis spacing is required. The self-clinching fastening method makes it a common choice in HVAC control boards, electrical panel assemblies, and industrial electronics where a secure, permanent female thread is needed in sheet metal or thin-panel mounting without welding or secondary fastening hardware. Sold in a package quantity of 25 units.

Key Features

• 4-40 female thread for standard machine screw compatibility
• Self-clinching with through-hole fastening method for permanent installation in sheet metal
• Hex body shape at 0.25 inches width across flats for wrench or socket installation
• Steel construction with zinc-plated finish for corrosion resistance
• Compact 0.187-inch overall length suits tight PCB spacing requirements
• Inch measurement system; UNSPSC Code 31161816

Compatibility

Designed as a standard 4-40 female hex self-clinching standoff for use in PCB assemblies, electronic enclosures, and control panel builds requiring an inch-series 4-40 threaded mount point in steel panels or boards.

Installation Notes

Installation of self-clinching standoffs requires a press or punch tool to seat the standoff permanently into the host material; do not hammer-install, as this can distort the hex body or damage the thread. Power down all equipment and discharge any capacitors before working on live control boards or panel assemblies. Follow applicable NEC guidelines when installing standoffs inside electrical enclosures. Verify hole diameter in the host panel matches the self-clinching specification before pressing to ensure proper retention force.