Electro Hardware MMF1301M0321M25 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1301M0321M25 is a male-female hex circuit board standoff designed to create fixed spacing between PCBs and mounting surfaces or between stacked boards. Machined from brass with a zinc-plated finish that meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff provides reliable electrical isolation and mechanical support in control board assemblies. The M2.5 x 0.45 thread size and 4.5 mm hex body make it compatible with standard metric fastener tooling. Overall length is 8.97 mm with a body length of 5.00 mm and a thread depth of 4.80 mm. Electricians, HVAC technicians, and electronics assemblers install these when servicing or building control board assemblies.

This standoff is used in residential and commercial applications wherever metric circuit board mounting hardware is required. Typical install scenarios include HVAC control board assemblies, industrial enclosures, and electronic chassis builds that require precise, repeatable board-to-board or board-to-chassis spacing. The hex profile allows installation and removal with standard metric wrenches or nut drivers without special tooling. Minimum order quantity is 5 pieces; each package contains 1 piece.

Key Features

• Male-female hex configuration allows stacking or surface mounting of circuit boards
• Brass construction with zinc-plated finish per ASTM B633 Type 1 and QQ-B-626 Comp 22
• M2.5 x 0.45 metric thread on both male and female ends
• 4.5 mm width across flats for standard metric wrench or nut driver installation
• Overall length of 8.97 mm with a length tolerance of -0.150 to 0.150 mm for precise board spacing
• Hex body profile resists rotation during installation and provides positive seating

Compatibility

Designed for use in metric circuit board assemblies requiring M2.5 x 0.45 standoff hardware with a 4.5 mm hex profile.

Installation Notes

Installation is typically performed by electronics assemblers, HVAC technicians, or electricians working on control board hardware. Power down and de-energize the control board assembly completely before removing or installing standoffs. Use a metric wrench or nut driver sized to 4.5 mm across flats to avoid rounding the hex body. Do not overtighten, as brass fasteners in thin PCB mounting holes can strip or crack the board substrate.