Electro Hardware MMF1323M0616M25 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1323M0616M25 is a male-female hex circuit board standoff designed to create precise spacing between PCBs and mounting surfaces or between stacked boards. Machined from aluminum alloy to QQ-A-225A Comp 2 specification, this standoff features an M2.5 x 0.45 thread on both ends and a hexagonal body for wrench engagement. The overall length is 19.97 mm (0.79 inches), with a 16.00 mm (0.63 inches) hex body and a 4.50 mm (0.18 inches) width across flats. The bright uncoated finish suits applications where anodizing or plating is not required. Electronics assemblers and PCB technicians install these standoffs in control boards, enclosures, and panel assemblies.

This standoff is used in metric fastener applications where M2.5 x 0.45 threading is required for board-level spacing and mounting. Typical install scenarios include electronic control enclosures, instrumentation panels, and stacked circuit board assemblies found in HVAC control systems, electrical panels, and similar trade equipment. The male thread engages a tapped hole or nut on the mating surface, while the female thread accepts a machine screw to secure the next board or component in the stack.

Key Features

• M2.5 x 0.45 male-female thread configuration for stacked PCB or board-to-chassis mounting
• Hexagonal body with 4.50 mm width across flats allows standard hex driver or wrench installation
• Overall length of 19.97 mm (0.79 inches) provides consistent board spacing in metric assemblies
• Aluminum construction to QQ-A-225A Comp 2 standard, Material Grade T3
• Bright uncoated finish - no additional coating to interfere with tight-tolerance fits
• Thread depth of 4.80 mm with length tolerance of -0.150 to 0.150 mm for dimensional consistency

Compatibility

Designed for metric PCB and panel assemblies requiring M2.5 x 0.45 male-female hex standoffs with a 4.50 mm hex body width.

Installation Notes

Electronics technicians install this standoff using a hex driver or appropriately sized wrench matched to the 4.50 mm flats. Ensure the mating hole or tapped insert is clean and properly sized for M2.5 x 0.45 threads before installation. De-energize all boards and assemblies before removing or installing standoffs in live control panels. Avoid over-torquing aluminum standoffs, as the alloy is softer than steel and threads can be damaged by excessive force.