Electro Hardware MMF1323M09F16M3 Hex Standoff M3x0.5

Product Description

The ELECTRO HARDWARE MMF1323M09F16M3 is a male-female hex circuit board standoff designed to create precise spacing between printed circuit boards and enclosure surfaces. Machined from 303 stainless steel with a bright uncoated finish, this standoff meets the QQ-S-763 federal specification for stainless steel fasteners. It features an M3x0.5 thread on the male end and a corresponding M3x0.5 female threaded bore on the opposite end. The hexagonal body measures 4.5 mm across flats, allowing secure engagement with a standard wrench or hex driver. Overall length is 20.76 mm, with a body length of 16.00 mm. Electronics technicians and electrical panel assemblers install these as part of PCB mounting hardware stacks in control boards and enclosures.

This standoff is suited for metric PCB mounting applications in industrial control panels, HVAC control board assemblies, electrical enclosures, and similar electronic equipment requiring a rigid, corrosion-resistant spacer. The male-female configuration allows multiple standoffs to be stacked or used in single-tier board mounting layouts. The stainless steel construction makes it appropriate for environments where corrosion resistance is a priority, including light washdown or high-humidity service conditions typical in HVAC and pool control equipment.

Key Features

• M3x0.5 male thread on one end and M3x0.5 female threaded bore on the opposite end for stacking versatility
• 303 stainless steel construction with bright uncoated finish for corrosion resistance
• Hexagonal body at 4.5 mm across flats for positive wrench engagement during installation
• Meets QQ-S-763 federal specification for stainless steel fastener material standards
• Overall length of 20.76 mm with a length tolerance of -0.150 to 0.150 mm for consistent board spacing
• UNSPSC Code 31161816 for procurement system compatibility

Compatibility

Designed as a metric M3x0.5 male-female hex standoff for use in PCB mounting applications requiring QQ-S-763 compliant stainless steel fasteners and a 4.5 mm hex body profile.

Installation Notes

Installation is typically performed by electronics technicians or licensed electricians during panel assembly or control board service. De-energize all circuits fully before removing or installing PCB standoffs. Use an appropriately sized metric wrench or hex driver on the 4.5 mm flats to avoid rounding the body. Do not overtighten; standoffs should be snug against the mounting surface without distorting the PCB substrate.