Electro Hardware MP423M09F16M3 Female Hex Standoff M3

Product Description

The ELECTRO HARDWARE MP423M09F16M3 is a female hex circuit board standoff designed to create precise spacing and secure threaded connections between PCBs and mounting surfaces. Machined from 303 stainless steel with a plain, bright uncoated finish, this standoff features an M3 x 0.5 female thread, a 12 mm overall length, and a fully threaded 12 mm thread depth. The hexagonal body measures 4.5 mm across the flats, allowing standard hex tooling for installation and removal. It meets the QQ-S-763 fastener standard. Electronics assembly technicians and PCB mounting specialists install this hardware during board assembly, rack mounting, and enclosure builds.

This standoff is suited for metric PCB stacking and mounting applications in electronics manufacturing, control panel assembly, and industrial enclosure builds. Its fully threaded female bore accepts an M3 x 0.5 machine screw or bolt from either end, making it practical for two-board stacking or board-to-chassis mounting scenarios. The stainless steel construction is appropriate for environments where corrosion resistance or non-magnetic properties are required. This is a metric-series component and is not interchangeable with unified inch-series standoffs of similar body dimensions.

Key Features

• Female M3 x 0.5 thread, fully threaded through 12 mm depth for maximum engagement
• Hex body at 4.5 mm width across flats — compatible with standard hex drivers and wrenches
• 303 stainless steel construction for corrosion resistance and durability
• Plain bright finish with no coating — maintains dimensional tolerances to -0.13 to 0.13 mm on length
• Meets QQ-S-763 fastener standard
• Lightweight at approximately 0.004 pounds per piece

Compatibility

Designed for use with M3 x 0.5 metric fasteners in PCB standoff and board-stacking applications. Compatible with any mounting application requiring a female hex standoff with an M3 x 0.5 thread form and a 12 mm body length.

Installation Notes

Install and remove using a hex wrench or nutdriver sized for 4.5 mm across flats. Power down and de-energize any control board or enclosure before installing or replacing standoffs. Avoid overtightening against PCB mounting holes, as stainless fasteners can crack board material or strip threads in softer substrates. Follow applicable IPC assembly standards and enclosure manufacturer torque guidelines where specified.