Electro Hardware MP445M03F21M2.5 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MP445M03F21M2.5 is a female hex circuit board standoff designed to create fixed spacing between PCBs and mounting surfaces in electronic assemblies. Manufactured from brass with a clear zinc chromate finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff provides reliable electrical isolation and mechanical support. The M2.5 x 0.45 metric thread accepts a mating male fastener on the open end while the partially threaded interior offers a 4.8 mm thread depth. With a 23 mm overall length and 4.5 mm width across flats, it suits compact board-level spacing applications in control panels, HVAC control boards, and similar electronic enclosures.

This standoff is used in residential and commercial electronic assemblies where metric M2.5 hardware is specified. Typical install scenarios include mounting control boards inside HVAC equipment, variable-speed drive enclosures, and electrical panel sub-assemblies. The hex body allows wrench engagement for secure, torque-controlled installation. Electricians, controls technicians, and electronics assembly technicians commonly handle this hardware during board-level service or OEM-style replacement builds.

Key Features

• Female hex body accepts M2.5 x 0.45 male fastener for board-to-board or board-to-chassis spacing
• 23 mm overall length with 4.8 mm partial thread depth for secure mating engagement
• 4.5 mm width across flats enables standard hex wrench or socket installation
• Brass construction with clear zinc chromate finish resists corrosion in enclosure environments
• Meets ASTM B633 Type 1 and QQ-B-626 Comp 22 finish standards
• Metric measurement system - compatible with M2.5 fastener ecosystems used in control and electronics applications

Compatibility

Designed as a metric M2.5 x 0.45 female hex standoff for use in circuit board mounting applications requiring a 23 mm standoff height and 4.5 mm hex body format.

Installation Notes

Installation is performed by electronics assembly technicians or controls technicians using a hex wrench or open-end wrench sized for 4.5 mm across flats. De-energize all equipment fully before working on any control board or enclosure interior. Do not overtighten - brass hardware is subject to thread damage if excessive force is applied. Follow applicable NEC requirements and equipment manufacturer torque guidance when securing control boards inside electrical enclosures.