Electro Hardware MMF1331M0616M25 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1331M0616M25 is a male-female hex circuit board standoff designed to create precise spacing between PCBs, panels, and enclosure surfaces in electronic assemblies. Machined from aluminum alloy to the QQ-A-225A Comp 2 standard, this standoff features an M2.5 x 0.45 thread on both ends with a bright uncoated finish. The hex body measures 4.5 mm across flats for easy wrench or nut-driver installation. The overall length is 23.97 mm, with a body length of 20.00 mm and a thread depth of 4.80 mm per female end. It is used by electronics technicians, PCB assemblers, and field service professionals working on control boards and enclosures.

This standoff is suited for metric fastener applications in light industrial, commercial, and residential electronic control assemblies. Common uses include mounting circuit boards inside HVAC control enclosures, electrical panels, and similar equipment where controlled board-to-surface clearance is required. The M2.5 x 0.45 metric thread is a standard pitch in compact PCB hardware, and the aluminum construction keeps weight low while maintaining structural integrity in typical indoor environments.

Key Features

• M2.5 x 0.45 metric thread on both male and female ends for standard PCB mounting
• Overall length of 23.97 mm with a 20.00 mm hex body for consistent board spacing
• Aluminum construction per QQ-A-225A Comp 2, Material Grade T3
• Bright uncoated finish - no added coating to affect thread fit or conductivity
• 4.5 mm hex body width for wrench or nut-driver installation
• Length tolerance held to -0.150 mm to 0.150 mm for precision stacking

Compatibility

Designed as a metric M2.5 x 0.45 male-female hex standoff for circuit board assemblies requiring aluminum hardware to the QQ-A-225A Comp 2 fastener standard. Verify thread pitch, overall length, and hex width requirements before installation.

Installation Notes

Installation is performed by electronics technicians or control board service professionals. Power down all equipment completely before removing or installing circuit board hardware. Use a wrench or nut driver sized to 4.5 mm across flats to avoid rounding the hex body. Do not overtighten onto PCB mounting holes, as aluminum threads can strip under excessive torque.