Electro Hardware P625M12F21-440 Hex Standoff 4-40 2in

Product Description

The ELECTRO HARDWARE P625M12F21-440 is a female hex circuit board standoff designed to create precise, stable spacing between PCBs and mounting surfaces in electronic enclosures and control assemblies. It features a 4-40 female thread, a 2-inch overall body length, and a 1/4-inch width across flats. Manufactured from Grade 2 steel with a zinc-plated clear chromate finish that meets ASTM B633 Type 1 and QQ-S-633 standards, this standoff provides corrosion resistance suitable for panel and enclosure environments. Electricians, control panel builders, and electronics technicians use these fasteners when assembling or servicing circuit board mounting systems.

This standoff is used in residential and commercial electrical control panels, HVAC circuit board assemblies, and general electronics enclosures where a threaded female-to-female hex spacer is required. The hexagonal body allows tool engagement with a wrench or nut driver for secure, torque-controlled installation. The 2-inch overall length provides substantial board-to-surface clearance for assemblies that require additional component clearance or cable routing beneath the PCB.

Key Features

• Female 4-40 threaded standoff accepts standard 4-40 machine screws on both ends
• 2-inch overall length provides generous PCB-to-surface clearance
• Hex body profile with 1/4-inch width across flats allows wrench or nut driver installation
• Grade 2 steel construction with zinc-plated clear chromate finish for corrosion resistance
• Meets ASTM B633 Type 1 and QQ-S-633 finish standards
• Length tolerance held to plus or minus 0.005 inches for consistent stack height

Compatibility

Designed as an OEM-style replacement or new-installation standoff for any circuit board assembly using 4-40 thread fasteners and requiring a 2-inch hex spacer in inch-measurement systems.

Installation Notes

Installation is performed by electricians or electronics technicians during panel assembly or circuit board service. De-energize all circuits and discharge any capacitors before working inside a control enclosure. Use a nut driver or open-end wrench sized to 1/4-inch across flats for proper engagement. Avoid over-torquing the 4-40 threads, as the fine thread pitch on small-diameter fasteners is susceptible to cross-threading or stripping if started off-axis.