Electro Hardware MMF1333M0616M25 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1333M0616M25 is a male-female hex circuit board standoff designed to create precise spacing and secure mechanical connections between PCB layers or between a board and a chassis. Machined from aluminum alloy T3 and left bright uncoated, this metric standoff features an M2.5 x 0.45 thread on both ends with a hexagonal body measuring 4.50 mm across flats. The overall length is 24.97 mm, with a body length of 21.00 mm, a thread depth of 4.80 mm, and a thread length of 3.97 mm. It is installed by electronics technicians and field service engineers working on control boards, panel assemblies, and embedded systems.

This standoff is suited for use in residential and commercial electronic control assemblies, HVAC control boards, industrial panel mounts, and general PCB stacking applications where a lightweight, non-ferrous fastener is required. The metric M2.5 x 0.45 thread size is common in compact control board assemblies and OEM electronics. Its uncoated aluminum finish is appropriate for indoor, low-corrosion environments where minimal hardware weight is a priority. Technicians working on printed circuit board assemblies in HVAC units, variable-frequency drives, or similar equipment will find this standoff dimensionally consistent and easy to install with standard metric tooling.

Key Features

• M2.5 x 0.45 male-female thread configuration for PCB stacking and chassis mounting
• Hexagonal body at 4.50 mm across flats for wrench engagement and torque control
• Overall length of 24.97 mm with a 21.00 mm hex body and 3.97 mm thread length
• Aluminum T3 alloy construction - lightweight and non-magnetic
• Bright uncoated finish per QQ-A-225A Comp 2 fastener standard
• Length tolerance held to -0.150 to 0.150 mm for consistent board spacing

Compatibility

Designed as an OEM-style metric standoff for M2.5 x 0.45 threaded PCB and chassis mounting applications in electronic control assemblies.

Installation Notes

This standoff is installed by electronics technicians or field service engineers using metric hex drivers or open-end wrenches sized for 4.50 mm across flats. Always de-energize and discharge the control board assembly before handling any PCB hardware. Avoid over-torquing aluminum standoffs, as the material is softer than steel and threads can strip under excessive force. Confirm thread engagement depth and board clearance before fully seating mating hardware.