Electro Hardware 1309M19F16440 Hex Standoff 4-40 Nylon

Product Description

The ELECTRO HARDWARE 1309M19F16440 is a male-female hex circuit board standoff designed to mount and space printed circuit boards within electronic enclosures and assemblies. Machined from nylon with a bright, uncoated finish, this standoff accepts a 4-40 thread and provides a 3/8-inch overall body length to create the necessary clearance between stacked boards or between a board and a mounting surface. With a width across flats of 3/16 inch and a hex body shape, it seats securely and torques down with standard hex drivers. The fastener meets MIL-P-17091B specifications, making it appropriate for assemblies where a recognized military fastener standard is required.

This standoff is used in residential and commercial electronics, control board assemblies, HVAC control panels, and industrial enclosures wherever PCB-to-surface or PCB-to-PCB spacing is needed. The nylon construction makes it well suited for applications requiring electrical isolation between the board and the chassis. Electricians, electronics technicians, and OEM assemblers working on low-voltage control systems or panel builds will encounter this type of hardware regularly. Its compact 4-40 thread size is common in light-duty PCB mounting across a wide range of control board form factors.

Key Features

• Male-female configuration allows daisy-chaining of standoffs or direct board-to-surface mounting
• 4-40 thread size suits standard PCB mounting hole patterns
• 3/8-inch body length provides consistent board spacing with 1/4-inch thread depth
• Nylon material provides inherent electrical isolation and corrosion resistance
• Bright, uncoated finish with hex body for wrench-assisted installation
• Meets MIL-P-17091B fastener standard

Compatibility

Designed as an OEM-style replacement or new-build fastener for printed circuit board assemblies requiring 4-40 threaded nylon hex standoffs with a 3/8-inch body length.

Installation Notes

Installation is typically performed by electronics technicians or electricians during control board assembly or panel build. Power down and de-energize any circuit board assembly completely before installing or removing standoffs. Use a hex driver or small wrench sized for 3/16-inch across flats to seat the standoff without over-torquing, as nylon fasteners can crack under excessive force. Follow applicable assembly documentation and any relevant low-voltage wiring standards for the enclosure type being serviced.