Electro Hardware MMF1329M0321M25 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1329M0321M25 is a male-female hex circuit board standoff designed to create precise spacing between stacked PCBs or between a PCB and a mounting surface. Machined from brass with a zinc plating that meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff provides corrosion resistance and reliable conductivity in electronic assemblies. The M2.5 x 0.45 metric thread runs on both ends, with a male thread length of 3.97 mm and a female thread depth of 4.80 mm. The hex body measures 4.50 mm across flats for easy wrench engagement, and the overall length is 22.97 mm with a body length of 19.00 mm and a length tolerance of plus or minus 0.150 mm.

This standoff is used in PCB assembly and electronic enclosure builds where metric fasteners are specified. Typical applications include industrial control panels, HVAC control boards, and electrical equipment that requires secure, repeatable board-to-board or board-to-chassis spacing. It suits any application calling for an M2.5 metric standoff with a hex profile and zinc-plated brass construction. The minimum order quantity is 10 pieces; each package contains 1 piece.

Key Features

• Male-female hex configuration for stacking or chassis-mount PCB installations
• M2.5 x 0.45 metric thread on both ends for compatibility with standard M2.5 hardware
• Brass base material with zinc plating meeting ASTM B633 Type 1 and QQ-B-626 Comp 22
• 4.50 mm width across flats for hex wrench or nut driver installation
• Tight length tolerance of plus or minus 0.150 mm for repeatable stack height
• UNSPSC Code 31161816 for procurement and catalog classification

Compatibility

Designed as a metric M2.5 x 0.45 male-female hex standoff for use in PCB assemblies and electronic enclosures that specify M2.5 metric fastener hardware.

Installation Notes

Installation is performed by electronics technicians or electrical assemblers. Use an appropriately sized hex nut driver or wrench on the 4.50 mm hex body to drive the male thread into the mating board or chassis without over-torquing the brass threads. Always de-energize and discharge any boards or assemblies before installing or removing standoffs. Follow applicable workmanship standards such as IPC-A-610 for PCB assembly when torque and handling requirements are specified.