Electro Hardware 1307M03F21440 Hex Standoff 4-40 Brass

Product Description

The ELECTRO HARDWARE 1307M03F21440 is a male-female hex circuit board standoff used to create precise spacing between PCBs, chassis panels, and mounting surfaces in electronic assemblies. Threaded 4-40 on both ends — male on one side, female on the other — this standoff provides a secure stacking point for circuit board layers or panel-mount hardware. The hex body measures 3/16 inch across flats, with an overall body length of 5/16 inch (0.3125 inch) and a thread depth of 1/4 inch. Constructed from brass with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, it delivers corrosion resistance suitable for indoor electronic enclosures and control panel builds.

This standoff is used in electronic control board assemblies found across HVAC, electrical, and industrial equipment. Technicians and panel builders install these when stacking PCBs in equipment enclosures, mounting control boards to chassis, or securing daughter boards to a main board at a fixed standoff height. The 4-40 thread is a common size in low-voltage control and instrumentation boards. Suitable for any application requiring a hex hex standoff at this thread size and body length in a brass-zinc construction.

Key Features

• Male-female configuration allows modular board stacking or chassis-to-board mounting in a single fastener
• 4-40 thread size on both ends suits standard control board and PCB fastening patterns
• Hex body at 3/16 inch across flats allows standard hex driver installation without slipping
• 5/16 inch overall body length with 1/4 inch thread depth provides consistent board spacing
• Brass base material with zinc-plated finish meets ASTM B633 Type 1 and QQ-B-626 Comp 22 corrosion standards
• Lightweight at 0.13 pounds per package, minimizing load on PCB mounting points

Compatibility

Designed as a standard 4-40 male-female hex standoff for use in electronic control board assemblies, PCB stacking applications, and panel-mount installations where a 5/16 inch standoff height and 3/16 inch hex body are specified.

Installation Notes

Installation is typically performed by electricians, electronics technicians, or control panel builders. Power down all equipment and discharge any capacitors before handling circuit boards or installing standoffs. A nut driver or hex wrench sized for 3/16 inch across flats is the appropriate tool; avoid over-tightening on brass threads, as brass is softer than steel and can strip or crack the female thread under excessive torque. Ensure mating board holes align with the standoff pattern before seating to prevent board stress.