Electro Hardware MMF1319M03F21M3 Hex Standoff M3x0.5

Product Description

The ELECTRO HARDWARE MMF1319M03F21M3 is a male-female hex circuit board standoff designed to create precise, stackable spacing between PCBs and chassis panels in electronic assemblies. Machined from brass with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff provides reliable electrical isolation and mechanical support in control boards, industrial enclosures, and HVAC equipment electronics. The M3 x 0.5 thread on both the male pin and female threaded bore allows secure fastening without cross-threading. Overall length is 17.76 mm (approximately 0.699 inches) with a hex body width across flats of 4.50 mm (approximately 0.177 inches).

This standoff is suited for use in residential and light commercial control board assemblies, including HVAC system control boards, motor drive electronics, and general electronic panel fabrication. The hex body shape allows a standard hex driver or pliers to apply consistent torque during installation. Technicians working on circuit board replacements, panel builds, or custom enclosure assemblies will find this fastener compatible with standard M3 metric hardware throughout the assembly.

Key Features

• M3 x 0.5 male-female thread configuration for stackable PCB mounting
• Brass construction with zinc-plated finish per ASTM B633 Type 1 and QQ-B-626 Comp 22
• Hex body shape at 4.50 mm width across flats for wrench or driver installation
• Overall length of 17.76 mm with a length tolerance of -0.150 to 0.150 mm for precise board spacing
• Thread depth of 6.40 mm on the female end; thread length of 4.76 mm on the male pin
• Metric measurement system; UNSPSC code 31161816

Compatibility

Designed as a metric M3 x 0.5 male-female hex standoff for use with standard M3 metric circuit board fastening applications in electronic enclosures and control panel assemblies.

Installation Notes

Installation is performed by electronics technicians or field service engineers using a hex driver, nut driver, or appropriately sized pliers sized to 4.50 mm across flats. De-energize and discharge all circuits before working on any control board assembly. Do not over-torque the male pin into mating threads, as brass fasteners are susceptible to thread galling under excessive force. Follow applicable enclosure and panel-build standards for your jurisdiction when mounting control boards in HVAC or electrical equipment.