Electro Hardware P325M19F16440 Hex Standoff 4-40 3/4in Nylon

Product Description

The ELECTRO HARDWARE P325M19F16440 is a female hex circuit board standoff designed for PCB mounting applications in electronic assemblies. This standoff uses a 4-40 thread and features a fully threaded female configuration with a 3/4-inch overall length and a 3/4-inch thread depth, allowing full engagement across the entire body. Constructed from nylon with a plain, uncoated finish, it provides electrical isolation between stacked boards or between a board and a chassis surface. The hexagonal body measures 3/16 inches across the flats, making it wrenchable for secure installation. It meets MIL-P-17091B fastener standards and carries a tensile strength rating of 16,500 psi.

This standoff is used in residential and commercial electronic control assemblies, including HVAC control boards, low-voltage relay panels, and general-purpose PCB stacking applications. Its nylon construction makes it well suited for installations where metal standoffs would create unwanted electrical conductivity or added weight. The 4-40 thread size is a common fastener specification across a wide range of circuit board hardware used by electronics technicians and controls installers in the trade.

Key Features

• Female hex body accepts 4-40 machine screws on both ends for PCB stacking or board-to-chassis mounting
• Fully threaded interior with 3/4-inch thread depth for maximum holding engagement
• Nylon construction provides electrical isolation and corrosion resistance
• 3/16-inch hex body width across flats allows standard nut driver or wrench installation
• Meets MIL-P-17091B fastener standard
• Tensile strength rated at 16,500 psi

Compatibility

Designed as an OEM-style replacement or standard-fit standoff for circuit board assemblies requiring 4-40 threaded female hex hardware with a 3/4-inch overall length and nylon construction.

Installation Notes

Installation is performed by electronics technicians or controls technicians working on PCB assemblies. Always power down and de-energize the control panel or circuit board assembly before installing or removing standoffs. A small nut driver sized for 3/16-inch hex flats is the appropriate tool for torquing this hardware. Avoid over-tightening nylon standoffs, as excessive force can strip the internal threads or crack the body.