Electro Hardware 1310M03F21440 Hex Board Standoff 4-40

Product Description

The ELECTRO HARDWARE 1310M03F21440 is a male-female hex circuit board standoff designed to create precise spacing and mechanical support between PCBs and enclosure panels or stacked boards. Machined from brass with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff provides corrosion resistance and reliable electrical isolation in electronic assemblies. The 4-40 threaded fastener accepts a 4-40 male screw on one end and provides a 4-40 female threaded socket on the other, enabling secure board-to-board or board-to-chassis mounting. Overall body length is 0.4063 inches with a 3/16-inch hex width across flats. Installed by electronics assemblers, field service technicians, and electricians working with control boards in HVAC, industrial, and commercial panel applications.

This standoff is suited for use in residential and light commercial electronic assemblies where consistent PCB standoff height and thread engagement are required. Typical applications include control board mounting in HVAC equipment, electrical enclosures, and industrial automation panels. The hex body shape allows easy installation and removal with a standard nut driver or hex wrench. The 1/4-inch thread depth on the female end ensures adequate thread engagement for 4-40 machine screws under normal vibration and service conditions.

Key Features

• Male-female configuration allows daisy-chain board stacking or board-to-chassis mounting with a single fastener type
• Brass construction with zinc plating meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards for corrosion resistance
• Hex body profile (3/16 inch across flats) accepts standard nut drivers for torque-controlled installation
• 4-40 thread size on both male and female ends for compatibility with standard machine screw hardware
• Length tolerance held to plus or minus 0.005 inches for consistent stack height in multi-board assemblies

Compatibility

Designed as a standard 4-40 male-female hex PCB standoff for use in any electronic assembly, enclosure, or control board application requiring 4-40 threaded hardware and a 13/32-inch overall body length.

Installation Notes

Installation is performed by electronics assemblers or licensed technicians servicing control boards in HVAC, electrical, or industrial equipment. Always de-energize and lockout the equipment before servicing any circuit board or replacing standoffs. Use a correctly sized nut driver matched to the 3/16-inch hex flats to avoid deforming the standoff body. Do not overtighten — brass fasteners are susceptible to thread stripping when torque is applied beyond hand-tight plus a controlled turn.