Electro Hardware MMX1502M12MSC-1 Hex Standoff M4

Product Description

The ELECTRO HARDWARE MMX1502M12MSC-1 is a male-male hex circuit board standoff designed to create fixed spacing between PCBs, panels, and chassis in electronic assemblies. Built to metric dimensions, it features an M4 x 0.7 thread size on both ends and a 3.5 mm overall body length. The hexagonal body profile measures 6 mm width across flats, allowing standard hex tooling for secure, torque-controlled installation. Manufactured from Grade 2 steel with a zinc-plated finish, this standoff meets the QQ-S-633 federal specification for plated steel fasteners. It is suitable for use in control boards, electronics enclosures, and circuit board mounting applications common in HVAC equipment, electrical panels, and industrial controls.

This standoff is used wherever a male-threaded post is needed on both ends to accept a nut or thread into a tapped hole on both sides of an assembly. Typical applications include PCB-to-panel mounting, board stacking, and component-level field repairs on control boards found in residential and light commercial HVAC systems, electrical enclosures, and automation equipment. The metric M4 thread makes it appropriate for equipment manufactured to metric fastener standards. Its compact 3.5 mm body length suits tight-clearance PCB assemblies where minimal board-to-surface spacing is required.

Key Features

• Male-male hex standoff with M4 x 0.7 metric threads on both ends
• 3.5 mm overall body length with a length tolerance of -0.150 to 0.150 mm
• 6 mm width across flats for use with standard hex drivers and wrenches
• Grade 2 steel construction with zinc-plated finish per QQ-S-633
• Thread length options of 8.50 mm, 9.00 mm, and 9.50 mm
• UNSPSC Code 31161816 for electronic hardware classification

Compatibility

Designed as a metric M4 x 0.7 male-male hex standoff suitable for circuit board and panel assemblies requiring QQ-S-633 compliant zinc-plated steel fasteners.

Installation Notes

Installation is typically performed by electronics technicians or field service engineers working on control board assemblies. De-energize all equipment and discharge any stored capacitive energy before handling circuit boards or replacing board hardware. Use an appropriately sized hex driver or wrench on the 6 mm hex body to avoid rounding the flats. Do not overtighten — apply only enough torque to seat the standoff firmly without stressing the PCB substrate.