Electro Hardware MP421M06F16M2.5 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MP421M06F16M2.5 is a female hex circuit board standoff designed to create fixed spacing between PCBs, chassis panels, and mounting surfaces in electronic assemblies. Machined from aluminum alloy to material grade T3 and finished plain (bright, uncoated), this standoff accepts an M2.5 x 0.45 thread with an 11 mm overall length and full 11 mm thread depth. The hexagonal body measures 4.5 mm across flats, allowing standard hex tooling for secure installation. It is well suited for use in control boards, electrical enclosures, and instrumentation panels where lightweight, corrosion-resistant hardware is required.

This standoff is used in residential and commercial electronic assemblies where circuit boards must be mounted at a fixed, repeatable height above a substrate. Common applications include HVAC control board mounting, electrical panel sub-assemblies, and instrumentation enclosures. The female thread on both ends receives M2.5 machine screws, allowing a board-to-board or board-to-chassis stacking configuration. The metric M2.5 x 0.45 thread size is standard across a wide range of PCB layouts used in industrial and commercial controls.

Key Features

• Female M2.5 x 0.45 thread, fully threaded to 11 mm depth for maximum engagement
• Hexagonal body at 4.5 mm across flats accepts standard hex drivers and wrenches
• Aluminum construction, material grade T3, provides a lightweight and corrosion-resistant standoff
• Plain bright finish — uncoated, no plating to interfere with close-tolerance fits
• Meets QQ-A-225A Comp 2 fastener standard
• Length tolerance of -0.13 to 0.13 mm supports consistent board-level spacing

Compatibility

Designed as an OEM-style replacement or new-build fastener for circuit board assemblies requiring M2.5 x 0.45 female hex standoffs with an 11 mm overall length.

Installation Notes

Installation is typically performed by electronics technicians or electricians during control board assembly or replacement. De-energize all circuits and discharge any capacitors before working inside an enclosure. Use a hex driver or nut driver sized for 4.5 mm across flats to avoid rounding the hex body. Do not overtighten mating screws into the aluminum threads, as aluminum fasteners are susceptible to thread stripping under excessive torque.