Electro Hardware MMF1329M09F16M3 Hex Standoff M3x0.5

Product Description

The ELECTRO HARDWARE MMF1329M09F16M3 is a male-female hex circuit board standoff designed to create fixed spacing between printed circuit boards or between a board and a mounting surface. Built from 303 stainless steel with a bright uncoated finish, this metric fastener uses an M3x0.5 thread on both ends. The overall length is 23.76 mm, the body length is 19.00 mm, and the hex body measures 4.50 mm across flats. The male thread length is 4.76 mm and the female thread depth is 6.40 mm, providing a secure engagement for standard M3 hardware. Licensed electricians, electronics technicians, and instrumentation professionals use this standoff in control panel assemblies, embedded systems, and industrial enclosures.

This standoff is suited for metric PCB mounting applications in both commercial and industrial environments. Typical installations include multi-board stacking configurations, control board mounting inside HVAC units, and DIN-rail mounted electronics assemblies. The stainless steel construction makes it appropriate for environments where corrosion resistance or cleanliness standards are a factor. It conforms to fastener standard QQ-S-763, which covers stainless steel hardware for industrial and mil-spec adjacent applications.

Key Features

• M3x0.5 male-female thread configuration for board-to-board or board-to-panel standoff mounting
• 303 stainless steel construction with bright uncoated finish for corrosion resistance
• Hex body at 4.50 mm across flats allows wrench installation and precise torque control
• Overall length of 23.76 mm with a 19.00 mm hex body for consistent board spacing
• Meets QQ-S-763 fastener standard for stainless steel hardware
• Length tolerance of -0.150 to 0.150 mm for tight dimensional control

Compatibility

Designed as an OEM-style metric standoff for PCB and panel mounting applications requiring M3x0.5 thread engagement and a 4.50 mm hex body profile.

Installation Notes

Installation is performed by electronics technicians or electricians during board assembly or enclosure build-out. Always de-energize and discharge the board or assembly before installing or removing standoffs near live circuits. Use an appropriate metric hex driver or wrench sized for 4.50 mm across flats to avoid rounding the hex body. Do not over-torque the male thread engagement into threaded inserts or PCB hardware, as M3 fasteners have limited thread engagement depth.