Electro Hardware MMF1339M0616M25 M2.5 Hex Standoff

Product Description

The ELECTRO HARDWARE MMF1339M0616M25 is a male-female hex circuit board standoff designed for metric fastening applications in electronics assembly and PCB mounting. Manufactured from aluminum alloy grade T3 with a bright uncoated finish, this standoff provides a rigid, lightweight spacer connection between stacked circuit boards or between a board and an enclosure panel. The M2.5 x 0.45 thread on both ends delivers a clean engagement suited to precision PCB work. The hex body measures 4.5 mm across flats, allowing standard hex tooling to be used during installation without damaging the board or adjacent components.

This standoff is used in residential and commercial electronics assemblies, control panel builds, and PCB stack configurations where metric hardware is specified. It is commonly installed by electronics technicians, automation panel builders, and HVAC controls specialists working with metric-threaded circuit board hardware. The male thread engages a mounting hole or nut on one end while the female thread accepts a screw or the mating male end of an adjacent standoff, enabling reliable board-to-board or board-to-chassis spacing.

Key Features

• M2.5 x 0.45 metric thread on both male and female ends for standard PCB mounting
• Overall length of 27.97 mm with a body length of 24.00 mm for precise board spacing
• Thread depth of 4.80 mm and thread length of 3.97 mm for secure engagement
• Hex body at 4.5 mm across flats - compatible with standard metric hex tooling
• Aluminum T3 alloy construction with bright uncoated finish - lightweight and corrosion-resistant in controlled environments
• Meets QQ-A-225A Comp 2 fastener standard

Compatibility

Designed for use in metric PCB and circuit board mounting applications requiring M2.5 x 0.45 thread hardware. Confirm thread pitch, overall length, and panel clearance against your board layout before installation.

Installation Notes

Installation is performed by electronics technicians or controls specialists using standard metric hex drivers or nut drivers sized for 4.5 mm across flats. Power down and discharge all capacitors in the circuit before working on any board assembly. Do not overtighten - aluminum threads are susceptible to galling and cross-threading. Length tolerance is -0.150 to 0.150 mm; verify stack height against your board spacing requirements before final assembly.