Electro Hardware 1309M03F21440 Hex Standoff 4-40 3/16 in

Product Description

The ELECTRO HARDWARE 1309M03F21440 is a male-female hex circuit board standoff designed to create fixed spacing between PCBs or between a board and a mounting surface. Machined from brass with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff accepts a 4-40 threaded fastener on both ends. The hex body measures 3/16 inches across flats and the overall body length is 3/8 inches (0.375 inches). The male thread length is 3/16 inches and the female thread depth is 1/4 inch. Electronic assembly technicians, field service techs, and OEM production personnel install these during board mounting and chassis assembly operations.

This standoff is suited for use in control boards, relay panels, and electronic enclosures found across HVAC control systems, electrical control panels, and industrial electronics. The 4-40 thread size is a common fastener standard in low-voltage circuit board assemblies. The hex body shape allows installation and removal with a standard hex wrench or nut driver, making it appropriate for both production-line assembly and field service replacement. Sold individually with a minimum order quantity of 10 units.

Key Features

• Male-female configuration spaces and stacks PCBs or mounts boards to chassis surfaces
• Brass construction with zinc-plated finish per ASTM B633 Type 1 and QQ-B-626 Comp 22
• 4-40 thread size on both male and female ends
• Hex body profile accepts standard nut driver or hex wrench for installation
• Length tolerance held to plus or minus 0.005 inches for consistent stack height
• Inch measurement system; body length 3/8 inches (0.375 inches)

Compatibility

Designed as an OEM-style replacement or assembly component for circuit board mounting applications requiring a 4-40 thread, 3/8-inch body length, hex standoff in inch-series fastener systems.

Installation Notes

Installation is performed by electronic assembly technicians or qualified service personnel. De-energize and discharge all circuits and capacitors before handling circuit boards or installing standoffs in live enclosures. Use a properly sized nut driver or hex wrench matched to the 3/16-inch across-flats hex body to avoid deforming the standoff. Do not overtighten; brass hardware is susceptible to thread stripping under excessive torque.