Electro Hardware MP435M09F16M3 Female Hex Standoff M3

Product Description

The ELECTRO HARDWARE MP435M09F16M3 is a fully threaded female hex circuit board standoff designed to create precise, rigid spacing between PCBs and mounting surfaces in electronic assemblies. Machined from grade 303 stainless steel with a plain bright finish, it delivers corrosion resistance and clean conductivity suitable for demanding environments. The standoff measures 18 mm overall length with an 18 mm full-thread depth on an M3 x 0.5 thread, and the hex body spans 4.5 mm across flats for wrench engagement. It is installed by electronics assembly technicians, field service engineers, and trade professionals building or servicing control boards in HVAC, electrical, and industrial equipment panels.

This standoff is suited for metric PCB mounting applications where a female-threaded hex spacer is required to accept an M3 fastener from both ends. Typical use cases include securing control boards inside HVAC units, electrical enclosures, and industrial equipment where consistent board clearance and vibration-resistant fastening are required. The hex body allows standard wrench or nut-driver installation, making it practical in tight panel assemblies. Its stainless steel construction makes it appropriate for environments with moisture exposure or where corrosion resistance is specified. The QQ-S-763 standard governs the stainless steel material specification for this fastener.

Key Features

• Fully threaded M3 x 0.5 female hex standoff with 18 mm thread depth — no unthreaded body section
• Grade 303 stainless steel construction for corrosion resistance and durability
• Plain bright finish — no coating to interfere with thread fit or electrical grounding paths
• 4.5 mm hex width across flats allows standard nut-driver or wrench installation
• Meets QQ-S-763 fastener material standard
• Compact overall length of 18 mm suitable for low-profile PCB stack applications

Compatibility

Designed as an OEM-style metric spacer for PCB and panel mounting applications requiring an M3 x 0.5 female hex standoff in grade 303 stainless steel.

Installation Notes

Installation is performed by electronics assembly technicians or qualified service personnel. Ensure the mating PCB mounting holes are cleared of debris and align properly before threading the standoff into position. Use a correctly sized nut driver or open-end wrench on the hex flats — do not use pliers, which can deform the hex body. Always de-energize the control board or panel before installing or removing standoffs in live equipment.