Electro Hardware 1309M09F16440 Hex Standoff 4-40 Ss

Product Description

The ELECTRO HARDWARE 1309M09F16440 is a male-female hex circuit board standoff designed to create fixed spacing between PCBs and mounting surfaces or between stacked boards. Machined from 303 stainless steel with a passivated finish per QQ-S-763, this standoff provides corrosion resistance suitable for demanding environments. The body measures 3/8 inch in overall length with a 3/16 inch width across the hex flats. The male thread is 4-40 with a 3/16 inch thread length, and the female end accepts a 4-40 thread to a depth of 1/4 inch. It is installed by electronics assemblers and field technicians during PCB mounting and chassis assembly work.

This standoff is used in residential and commercial control board assemblies, industrial electronics enclosures, HVAC equipment control panels, and similar applications where a precise, rigid standoff is required between circuit boards or between a board and a chassis. The hex body allows installation and removal with a wrench or nut driver without marring adjacent components. The passivated stainless construction makes it appropriate for environments where mild chemical exposure or humidity is a concern.

Key Features

• Male-female hex configuration spaces and secures circuit boards to chassis or between stacked PCB assemblies
• 303 stainless steel construction with passivated finish per QQ-S-763 for corrosion resistance
• 4-40 thread size on both male and female ends for standard PCB hardware compatibility
• Overall body length of 3/8 inch with 3/16 inch width across hex flats
• Female thread depth of 1/4 inch accommodates standard 4-40 machine screws
• Hex body shape allows wrench or nut driver installation without slipping

Compatibility

Designed as an OEM-style replacement or new-installation standoff for circuit board assemblies using 4-40 hardware with a 3/8 inch stack height requirement.

Installation Notes

Installation should be performed with power removed from the circuit board assembly before handling any PCB hardware. Use a 3/16 inch hex nut driver or appropriately sized wrench to drive the male end into the mounting surface and seat the hex body flush. Do not overtighten, as stainless fasteners are susceptible to galling. Follow applicable workmanship standards for the assembly type when installing PCB standoffs in control panel or electronic equipment applications.