Electro Hardware P437M19F16440 Hex Standoff 4-40 2.5in Nylon

Product Description

The ELECTRO HARDWARE P437M19F16440 is a female hex circuit board standoff designed to mount and space printed circuit boards within electronic enclosures, control panels, and equipment assemblies. Machined from nylon with a plain, uncoated finish, this standoff threads onto a 4-40 fastener and provides a secure female receiving thread for the mating screw. The overall length is 2.5 inches, making it well suited for applications requiring a longer board-to-surface standoff distance. It carries a tensile strength rating of 16,500 psi, meeting the dimensional and material requirements of MIL-P-17091B. Electronic assembly technicians and panel builders install this hardware during board mounting operations in both commercial and industrial settings.

This standoff is used wherever a 4-40 thread pattern is required to elevate and secure a circuit board above a chassis, panel, or sub-plate. The 3/16-inch hex body width across flats allows standard hex driver tooling for installation and removal. With a thread depth of 1/4 inch, it accepts typical 4-40 machine screws used in PCB mounting applications. The nylon construction provides electrical isolation between the board and the mounting surface, which is a common requirement in control board and low-voltage electronics assemblies across HVAC, electrical, and industrial equipment.

Key Features

• Female 4-40 thread on both ends for board-to-surface mounting
• 2.5-inch overall length provides extended board standoff clearance
• Nylon material grade 101 offers electrical isolation and corrosion resistance
• Hex body at 3/16 inches width across flats accepts standard hex drivers
• Meets MIL-P-17091B fastener standard for dimensional compliance
• Plain, uncoated finish with tensile strength of 16,500 psi

Compatibility

Designed for use in any application requiring a 4-40 female hex nylon standoff with a 2.5-inch overall length and MIL-P-17091B compliance, including PCB mounting in electronic control panels and equipment enclosures.

Installation Notes

Electronic assembly technicians and electricians install this standoff using a standard hex driver sized for 3/16-inch flats. De-energize all circuits and discharge any capacitors before working on circuit board assemblies. Avoid over-torquing, as nylon hardware has lower torque thresholds than metal standoffs and can crack or strip under excessive force. Follow applicable NEC guidelines when installing standoffs within electrical enclosures.