Electro Hardware MMF1305M09F16M3 Hex Standoff M3x0.5

Product Description

The ELECTRO HARDWARE MMF1305M09F16M3 is a male-female hex circuit board standoff designed to create precise spacing between stacked PCBs or between a circuit board and a mounting surface. The standoff features an M3x0.5 male thread on one end and an M3x0.5 female thread on the other, allowing boards to be secured and spaced in a single fastener pass. Constructed from 303 stainless steel with a bright uncoated finish, it meets the QQ-S-763 fastener standard. The hex body profile allows for wrench engagement during installation. Overall length is 11.76 mm (approximately 0.463 inches), with a body length of 7.00 mm and a thread depth of 6.40 mm on the female end.

This standoff is suited for use in electronics assemblies requiring corrosion-resistant hardware, including control boards found in HVAC equipment, industrial enclosures, and commercial electrical panels. The metric M3x0.5 thread size makes it appropriate for PCB mounting applications following metric fastener conventions. Technicians and electronics assemblers working on board-level repairs or custom enclosure builds will find this standoff useful wherever rigid, repeatable board-to-board or board-to-chassis spacing is required. The stainless steel construction resists oxidation in environments with elevated humidity.

Key Features

• M3x0.5 male-female thread configuration for stackable PCB mounting
• 303 stainless steel construction meets QQ-S-763 standard
• Hex body at 4.5 mm width across flats allows wrench or nut-driver installation
• Overall length of 11.76 mm with a length tolerance of -0.150 to 0.150 mm for precise board spacing
• Bright uncoated finish maintains dimensional accuracy without coating buildup on threads
• Lightweight at approximately 0.00384 pounds per piece

Compatibility

Designed as an OEM-style replacement or standard-use hex standoff for circuit board assemblies requiring M3x0.5 metric thread fasteners with a 4.5 mm hex body profile.

Installation Notes

Installation is typically performed by electronics technicians or field service engineers working on PCB assemblies. De-energize all boards and discharge any capacitors before handling circuit board hardware. Use an appropriately sized nut driver or hex wrench sized for a 4.5 mm across-flats hex body to avoid rounding the standoff during tightening. Do not over-torque the M3 threads, as stainless steel fasteners in close-tolerance metric threads are susceptible to galling.