Electro Hardware MP429M03F21M3 Hex Standoff M3 Brass

Product Description

The ELECTRO HARDWARE MP429M03F21M3 is a female hex circuit board standoff designed to create precise spacing between PCBs and mounting surfaces in electronic assemblies. Built from brass with a clear zinc chromate (zinc-plated) finish per ASTM B633 Type 1 and QQ-B-626 Comp 22, this standoff provides reliable electrical isolation and secure mechanical support. The metric M3 x 0.5 internal thread runs the full 15 mm body length, giving technicians complete thread engagement with standard M3 hardware. The hexagonal body measures 4.5 mm across flats, allowing installation and removal with standard hex drivers or wrenches. Electronics assemblers, field service technicians, and PCB integration specialists typically install this hardware in control panels, industrial enclosures, and circuit board assemblies.

This standoff is suited for use in metric-threaded PCB mounting applications where consistent board-to-board or board-to-chassis spacing is required. The fully threaded female design accepts M3 x 0.5 screws from both ends, making it appropriate for stacked board configurations as well as single-point standoff mounting. The brass construction combined with zinc plating provides corrosion resistance in light-duty indoor environments. Length tolerance is held to -0.13 mm to 0.13 mm, supporting assemblies where board clearance is critical.

Key Features

• Female hex body with M3 x 0.5 fully threaded bore, 15 mm thread depth
• Brass construction with clear zinc chromate finish for corrosion resistance
• Meets ASTM B633 Type 1 and QQ-B-626 Comp 22 finish standards
• Hexagonal body at 4.5 mm across flats for wrench or driver installation
• Tight length tolerance of -0.13 mm to 0.13 mm for precise PCB spacing
• Metric system of measurement, compatible with M3 hardware ecosystems

Compatibility

Designed as an OEM-style metric standoff for use with M3 x 0.5 threaded fasteners in circuit board mounting and PCB stacking applications.

Installation Notes

Electronics assemblers and field service technicians should power down and de-energize all equipment before installing or removing circuit board standoffs. Use a wrench or hex driver sized to 4.5 mm across flats to seat the standoff without over-torquing the brass body. Verify thread engagement on both mating fasteners before applying load. Follow applicable IPC assembly standards and equipment manufacturer guidelines for PCB mounting clearances.