Electro Hardware P373M19F16440 Hex Standoff 4-40 Nylon

Product Description

The ELECTRO HARDWARE P373M19F16440 is a female hex circuit board standoff designed to create measured spacing between PCBs, mounting plates, and electronic assemblies. Machined from nylon with a plain, bright uncoated finish, this standoff accepts a 4-40 thread with a 1/4 inch thread depth and measures 1.5 inches in overall length. The hexagonal body, 3/16 inches across flats, allows for wrench engagement during installation without risking damage to adjacent board traces. It meets MIL-P-17091B fastener standards, making it suitable for defense, industrial, and commercial electronics applications where material grade 101 nylon is specified.

This standoff is used in circuit board assemblies where non-conductive spacing hardware is required. Common installation scenarios include mounting logic boards, relay boards, and control boards inside HVAC equipment, electrical panels, and industrial enclosures. The female-threaded design allows a mating screw or male standoff to thread into each end, stacking boards or securing them to a chassis at a fixed, repeatable distance. Installers working on control board replacement or panel builds will find this standoff appropriate for any application calling for a 4-40, nylon, hex-body female standoff at 1.5 inches OAL.

Key Features

• Female 4-40 thread with 1/4 inch thread depth on each end for secure board-to-board or board-to-chassis mounting
• 1.5 inch overall length provides consistent, measurable standoff distance between PCB layers or mounting surfaces
• Nylon construction provides electrical insulation and eliminates risk of shorting adjacent board traces
• 3/16 inch hex body width allows standard hex wrench or nut driver engagement without overtorque risk
• MIL-P-17091B certified, material grade 101 nylon with a tensile strength of 16,500 psi
• Plain, bright uncoated finish — no coatings to crack, flake, or contaminate board surfaces

Compatibility

Designed as an OEM-style replacement or new-installation hardware for any circuit board assembly requiring a female, hex-body, 4-40 threaded nylon standoff with 1.5 inch overall length and MIL-P-17091B compliance.

Installation Notes

Nylon standoffs should be installed by hand or with a correctly sized hex driver to avoid stripping the threads — do not use impact tools. Power down and de-energize all circuits before removing or installing circuit board hardware. Follow applicable NEC guidelines and equipment manufacturer torque recommendations for PCB fasteners. Inspect threads for cross-threading before applying any torque, as nylon is more susceptible to thread damage than metal fasteners.