Electro Hardware ESO-6440-16ZI Hex Standoff 4-40 0.5in Pack 25

Product Description

The ELECTRO HARDWARE ESO-6440-16ZI is a female hex circuit board standoff designed to create precise separation and secure mechanical spacing between printed circuit boards and enclosures or mounting surfaces. Manufactured from steel with a zinc-plated finish for corrosion resistance, this standoff measures 0.5 inches in overall length with a 0.25-inch width across flats and accepts 4-40 threaded fasteners. Installation uses a self-clinching with through-hole fastening method, providing a flush, permanent mount in sheet metal and thin panel applications. Electronics assemblers and electrical technicians working on control boards, panel assemblies, and enclosure builds rely on this type of hardware for reliable board support.

This standoff is suited for use in residential and commercial control panel assemblies, industrial enclosures, and electronics manufacturing environments where precise PCB standoff height and thread engagement are required. The hex body shape allows for tool engagement during installation and removal. Sold in a package quantity of 25, this part is appropriate for production runs, service bench stock, or field repair kits where multiple boards or assemblies are being serviced at once.

Key Features

• Female 4-40 threaded through-hole accepts standard 4-40 machine screws
• Self-clinching fastening method for permanent, flush installation in sheet metal panels
• Hex body shape allows wrench engagement for controlled installation and removal
• Zinc-plated steel construction provides corrosion resistance in indoor enclosure environments
• 0.5-inch overall length provides consistent PCB standoff height
• Sold in a pack of 25 for bench stock or production use

Compatibility

Designed as a standard 4-40 female hex circuit board standoff for use in PCB mounting applications requiring a 0.5-inch standoff height and self-clinching installation into sheet metal or thin panel substrates.

Installation Notes

Installation of self-clinching standoffs requires a squeezing force applied perpendicular to the panel sheet, typically using an arbor press or equivalent tooling — do not hammer these into place. Ensure the mounting panel material and thickness are compatible with the self-clinching design before installation. De-energize all circuits before servicing any control board or enclosure assembly. Consult applicable NEC guidelines when installing or replacing hardware within electrical enclosures.