Electro Hardware MP441M03F21M2.5 Female Hex Standoff

Product Description

The ELECTRO HARDWARE MP441M03F21M2.5 is a female hex circuit board standoff designed to create precise 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 corrosion resistance and reliable electrical isolation in panel and enclosure builds. The M2.5 x 0.45 metric thread accepts a mating male fastener from above while threading onto a screw or stud from below, making it a standard hardware choice for PCB mounting tasks performed by electricians, electronics technicians, and controls engineers.

This standoff is suited for residential and commercial electronic control panel assemblies, industrial enclosures, and circuit board mounting applications where metric hardware is specified. The hex body profile allows installation and removal with a standard hex driver or wrench, making it practical in tight board-level assemblies. Its 21 mm overall length provides controlled standoff height for boards requiring clearance from the mounting substrate.

Key Features

• Female-female hex body accepts M2.5 x 0.45 metric thread on both ends
• 21 mm overall length with a length tolerance of -0.13 to 0.13 mm for precise PCB stack height
• 4.8 mm thread depth provides secure thread engagement for the fastener
• 4.5 mm width across flats allows installation with standard hex tooling
• Brass construction with clear zinc chromate finish meets ASTM B633 Type 1 and QQ-B-626 Comp 22
• Partially threaded design with hex body shape for controlled torque and positive seating

Compatibility

Designed as a standard metric M2.5 x 0.45 female hex circuit board standoff for use in PCB mounting assemblies where a 21 mm standoff height and 4.5 mm hex profile are specified.

Installation Notes

Installation is performed by electronics technicians, electricians, or controls assemblers working on PCB mounting tasks. Always de-energize and discharge the board assembly before installing or removing standoffs. Use a properly sized hex driver or wrench matched to the 4.5 mm width across flats to avoid deforming the hex body. Do not overtighten, as brass hardware is subject to thread stripping under excessive torque.