Electro Hardware MP1037M03F21M3 Female Hex Standoff M3

Product Description

The ELECTRO HARDWARE MP1037M03F21M3 is a female hex circuit board standoff designed to create precise spacing between PCBs and mounting surfaces in electronic assemblies. Machined from brass with a zinc-plated finish that meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff delivers corrosion resistance and reliable electrical isolation. The fully threaded M3 x 0.5 female thread runs the full 19 mm body length, allowing secure fastener engagement from both ends. The hexagonal body profile measures 6 mm across the flats, accommodating standard hex drivers for controlled installation torque. Electronics technicians, panel builders, and field service engineers working on control boards and instrumentation assemblies use this hardware for repeatable standoff heights.

This standoff is suited for metric fastener applications in residential and commercial electronics, HVAC control board assemblies, electrical panel instrumentation, and industrial PCB mounting configurations. The M3 x 0.5 thread pitch is a common metric standard found in low-voltage control boards, sensor modules, and embedded controller assemblies across HVAC, electrical, and automation equipment. Its compact 6 mm hex width fits into densely populated board layouts without interfering with adjacent components.

Key Features

• Fully threaded female M3 x 0.5 interior thread with 19 mm thread depth for full-length fastener engagement
• Brass construction with zinc-plated finish per ASTM B633 Type 1 and QQ-B-626 Comp 22 for corrosion resistance
• Hexagonal body with 6 mm width across flats for positive grip with standard hex tools
• 19 mm overall length provides consistent board-to-surface spacing in stacked PCB assemblies
• Length tolerance of -0.13 to 0.13 mm for precise stack-up control in tight assemblies
• Metric measurement system; compatible with standard M3 machine screws and threaded inserts

Compatibility

Designed for use with M3 x 0.5 metric fasteners in circuit board standoff applications. Suitable as an OEM-style mounting hardware component in PCB assemblies that require a 19 mm female hex standoff with a 6 mm hex body profile.

Installation Notes

Installation is performed by electronics technicians or licensed electricians working on control board assemblies. Power down and de-energize all circuits before servicing any PCB or control board. Use a correctly sized hex driver or nut driver matched to the 6 mm across-flats dimension to avoid rounding the hex body. Do not over-torque; brass hardware is susceptible to thread stripping if fastener torque is not managed carefully.