Electro Hardware MMF1305M0321M25 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1305M0321M25 is a male-female hex circuit board standoff designed to create precise spacing between PCBs and mounting surfaces in electronic assemblies. The standoff features an M2.5 x 0.45 metric thread on both the male and female ends, an overall length of 10.97 mm, and a hex body measuring 4.50 mm across flats. Constructed from brass with a zinc plating finish that meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this fastener delivers corrosion resistance and reliable thread engagement in tight board-stacking applications. Electricians, electronics technicians, and panel assemblers install these standoffs when building or servicing control boards, enclosures, and instrumentation panels.

This standoff is suited for metric PCB assemblies in residential and commercial control panels, HVAC control boards, electrical enclosures, and instrumentation equipment where consistent board spacing and secure mechanical mounting are required. The male-female configuration allows standoffs to be stacked or used as a direct board-to-chassis mount. The hex body shape allows installation and removal with standard hex drivers or open-end wrenches without damaging the surrounding board surface.

Key Features

• M2.5 x 0.45 metric thread on both male and female ends for secure, precise fastening
• Overall length of 10.97 mm with a body length of 7.00 mm and thread length of 3.97 mm
• Thread depth of 4.80 mm provides reliable engagement in stacked PCB applications
• Hex body shape with 4.50 mm width across flats allows easy tool installation
• Brass construction with zinc plating meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards
• Length tolerance of -0.150 to 0.150 mm ensures consistent board standoff height

Compatibility

Designed for use in metric M2.5 PCB assemblies and control board mounting applications requiring a male-female hex standoff configuration.

Installation Notes

Installation is performed by electronics technicians or licensed electricians during panel assembly or control board service. Power down and de-energize the assembly completely before installing or removing standoffs near live boards. Use a properly sized hex driver or open-end wrench matched to the 4.50 mm hex body to avoid rounding the flats or stressing the board. Follow applicable NEC guidelines when installing standoffs inside electrical enclosures.