Electro Hardware 1439M06F16-440 Hex Standoff 4-40 Aluminum

Product Description

The ELECTRO HARDWARE 1439M06F16-440 is a male-female hex circuit board standoff designed to create precise spacing between PCBs and mounting surfaces in electronic assemblies. Machined from 6061-T3 aluminum with an anodized finish, this fastener meets the QQ-A-225A Comp 2 material standard. The standoff measures 0.8125 inches in overall length with a 0.625-inch hex body and a 1/4-inch hex width across flats. The male thread protrudes 3/16 inch and the female thread depth is 1/4 inch, both in a 4-40 thread size. Licensed electricians, electronics technicians, and PCB assembly professionals install these fasteners during panel builds and control board mounting applications.

This standoff is suited for use in electronic control panels, HVAC control boards, industrial enclosures, and other applications where secure, stacked PCB mounting is required. The 4-40 thread size is a common standard in light-duty electronics and low-voltage control board assemblies. The hex body shape allows installation and removal with standard nut drivers or hex wrenches, making it practical for production and field service environments alike.

Key Features

• Male-female configuration allows daisy-chain stacking of circuit boards
• 4-40 thread size on both male post and female receptacle
• Hex body shape accepts standard 1/4-inch nut driver for tool-driven installation
• Anodized aluminum construction provides corrosion resistance at low weight
• Meets QQ-A-225A Comp 2 material standard for aluminum fasteners
• Length tolerance held to plus or minus 0.005 inches for consistent board spacing

Compatibility

Designed as an OEM-style replacement or new-build component for circuit board assemblies requiring 4-40 threaded hex standoffs with a 13/16-inch overall length.

Installation Notes

De-energize all circuits before installing or removing standoffs in live control panels or PCB assemblies. Use a 1/4-inch nut driver or appropriately sized hex tool to drive the male end into a tapped hole or mating female standoff. Avoid overtightening, which can strip the 4-40 threads in aluminum. Installation should follow applicable assembly drawings and any governing electrical codes for the panel type being serviced.