Electro Hardware P325M09F16440 Hex Standoff 4-40 3/4in Ss

Product Description

The ELECTRO HARDWARE P325M09F16440 is a female hex circuit board standoff machined from 303 stainless steel with a plain, bright uncoated finish. It accepts a 4-40 thread and measures 0.75 inches overall length with a width across flats of 0.1875 inches. The body is fully threaded with a thread depth of 0.25 inches. This standoff is used to separate and support printed circuit boards from chassis surfaces, creating the clearance needed for component clearance and airflow. It meets the QQ-S-763 fastener standard. Electricians, electronics technicians, and panel builders working on control boards, relay panels, or enclosure assemblies will find this fastener a standard choice for PCB mounting tasks.

This standoff is suited for light-duty electronic and electrical panel assemblies where corrosion resistance is a priority. The 303 stainless steel construction makes it a practical option in environments where mild moisture exposure or frequent cleaning is expected. Its inch-system dimensions target applications using standard 4-40 machine screws, which are common in HVAC control boards, small relay panels, and instrument enclosures. The single-piece hex body simplifies installation with standard hex drivers or wrenches.

Key Features

• Female 4-40 thread accepts standard 4-40 machine screws on both ends for secure PCB stacking
• 303 stainless steel construction provides corrosion resistance without sacrificing machinability
• 0.75 inches overall length with 0.25 inches thread depth for reliable thread engagement
• Hex body shape allows torque application with standard nut drivers or open-end wrenches
• Plain, bright uncoated finish meets QQ-S-763 stainless steel fastener standard
• Width across flats of 0.1875 inches suits close-pitch PCB layouts with limited clearance

Compatibility

Designed as a standard 4-40 female hex standoff for use in circuit board assemblies, electrical enclosures, and panel builds that use inch-series fasteners and require a 0.75 inches standoff height.

Installation Notes

Installation is performed by electronics technicians, electricians, or panel assemblers using a standard hex driver or open-end wrench sized to 0.1875 inches across flats. De-energize and lock out any panel or board assembly before installing or removing standoffs. Apply torque carefully to avoid galling, which can occur with stainless steel fasteners; use anti-seize compound if repeated removal is expected. Follow applicable enclosure and panel wiring standards such as NEC Article 110 for working clearances when positioning boards within enclosures.