Electro Hardware 1304M09F16440 Hex Standoff 4-40 Ss

Product Description

The ELECTRO HARDWARE 1304M09F16440 is a male-female hex circuit board standoff designed to create precise spacing between PCBs, chassis panels, and mounting surfaces in electronic assemblies. Machined from 303 stainless steel with a passivated finish per QQ-S-763, this standoff resists corrosion and contamination in demanding environments. The hex body measures 3/16 inches across flats, the overall body length is 7/32 inches (0.2188 inches), and the thread size is 4-40. One end accepts a male 4-40 thread while the opposite end provides a female 4-40 threaded receive, allowing stackable or panel-mount configurations. Licensed electronics assembly technicians, board-level repair technicians, and trade professionals working on control boards in HVAC, electrical, and similar equipment use this type of hardware routinely.

This standoff is suited for residential and light commercial control board assemblies, instrument panels, and enclosures where consistent PCB standoff height and electrical isolation are required. Typical applications include HVAC control board mounting, electrical enclosure PCB stacking, and any panel assembly calling for a 4-40 threaded hex standoff at the 7/32-inch body length. The passivated stainless steel construction makes it appropriate for environments with moderate humidity or chemical exposure where plain steel or zinc-plated hardware is not adequate.

Key Features

• Male-female hex configuration allows secure PCB-to-panel or board-to-board standoff mounting
• 303 stainless steel construction with passivated finish per QQ-S-763 for corrosion resistance
• 4-40 thread size on both male and female ends for compatibility with standard 4-40 fastener systems
• Hex body profile (3/16 inches across flats) allows wrench or nut driver installation and removal
• Tight length tolerance of plus or minus 0.005 inches ensures consistent stack height in multi-board assemblies
• Inch-system dimensions for straightforward integration into standard American fastener layouts

Compatibility

Designed as an OEM-style replacement or new-installation standoff for circuit board assemblies using 4-40 threaded fasteners with a 7/32-inch body length requirement. Verify thread engagement depth and panel clearance requirements before installation.

Installation Notes

Installation is performed by electronics assembly technicians or trade professionals working on control board assemblies. Power down and de-energize any equipment completely before removing or installing circuit board standoffs. Use an appropriately sized hex nut driver or wrench sized for 3/16-inch across-flats hardware to avoid rounding the hex body. Do not overtighten — apply only enough torque to seat the standoff flush without stressing the PCB substrate.