Electro Hardware MP429M09F16M3 Hex Standoff M3 0.5

Product Description

The ELECTRO HARDWARE MP429M09F16M3 is a female hex circuit board standoff designed to create precise spacing between PCBs and mounting surfaces in electronic assemblies. Machined from 303 stainless steel with a plain (bright/uncoated) finish, this standoff accepts an M3 x 0.5 threaded fastener and provides a fully threaded interior across its entire 15 mm body length. The hex body measures 4.5 mm across flats, allowing installation and removal with standard hex tooling. Electronics assembly technicians, field service engineers, and industrial maintenance professionals use these standoffs in control boards, power supplies, and enclosure mounting applications where corrosion resistance and dimensional consistency matter.

This standoff is suited for metric fastener assemblies requiring a rigid, non-compressible spacer between circuit board layers or between a board and a chassis. The M3 x 0.5 thread size is common in industrial control panels, HVAC equipment circuit boards, variable frequency drives, and general electronics enclosures. The stainless steel construction makes it a reliable choice in environments where mild corrosives, moisture, or temperature cycling could degrade zinc or brass alternatives. Length tolerance is held to minus 0.13 mm to plus 0.13 mm, supporting repeatable stack-up geometry across multi-board assemblies.

Key Features

• M3 x 0.5 female thread, fully threaded through the 15 mm body length
• Hex body profile, 4.5 mm width across flats, compatible with standard metric hex drivers
• 303 stainless steel construction with plain bright finish for corrosion resistance
• Tight length tolerance of minus 0.13 mm to plus 0.13 mm for precise PCB stack-up
• Meets QQ-S-763 fastener standard for stainless steel hardware
• Minimum order quantity of 10 units per order

Compatibility

Designed as a metric-thread female hex standoff for use with M3 x 0.5 fasteners in circuit board mounting, chassis assembly, and enclosure applications requiring a 15 mm standoff height.

Installation Notes

Installation is typically performed by electronics assembly technicians or field service personnel using a metric hex driver or wrench sized for 4.5 mm across flats. Always de-energize the board or assembly completely before installing or removing standoffs near live circuits. Avoid over-torquing the mating fastener into the female thread, as stainless-to-stainless galling can occur without proper lubrication or anti-seize compound. Follow the equipment manufacturer's assembly documentation for torque guidance specific to the host assembly.