Electro Hardware MP431M03F21M2.5 Female Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MP431M03F21M2.5 is a female hex circuit board standoff designed to create fixed spacing between PCBs, mounting plates, and enclosure panels in electronic assemblies. The body is fully threaded with an M2.5 x 0.45 metric thread, a 16 mm overall length, and a full 16 mm thread depth. Manufactured from brass with a clear zinc chromate finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22, this standoff provides corrosion resistance and reliable electrical isolation in panel-mount and rack-mount applications. Electricians, control panel builders, and electronics technicians install these when assembling low-voltage control boards and instrumentation enclosures.

This standoff is suited for metric PCB assemblies requiring precise board-to-board or board-to-chassis spacing. The hex body profile - 4.5 mm width across flats - allows installation and torque with standard hex drivers or wrenches without marring the body. Typical applications include HVAC control board assemblies, industrial enclosures, and electrical panel subassemblies where secure, repeatable standoff height is required. The zinc-plated brass construction makes it appropriate for indoor and light-duty protected environments.

Key Features

• M2.5 x 0.45 metric female thread, fully threaded to full 16 mm depth
• Hex body with 4.5 mm width across flats for tool-driven installation
• Brass base material with clear zinc chromate finish for corrosion resistance
• Meets ASTM B633 Type 1 and QQ-B-626 Comp 22 finish standards
• Length tolerance of -0.13 to 0.13 mm for consistent stack height
• Metric system of measurement - direct fit for M2.5 metric fastener applications

Compatibility

Designed as an OEM-style metric standoff for circuit board and panel assemblies using M2.5 x 0.45 metric thread fasteners.

Installation Notes

Installation is typically performed by control panel assemblers or electronics technicians. Power down and de-energize all circuits before servicing any board or enclosure assembly. Use a hex driver or open-end wrench sized to 4.5 mm across flats to seat the standoff without over-torquing the brass body. Follow applicable assembly drawings and any governing enclosure or panel standards for your application.