Electro Hardware 1312M03F21440 Hex Standoff 4-40

Product Description

The ELECTRO HARDWARE 1312M03F21440 is a male-female hex circuit board standoff designed to create fixed spacing between PCBs, panels, or enclosure surfaces. The standoff features a 4-40 unified thread, a hex body measuring 3/16 inches across flats, and an overall length of 15/32 inches (0.4688 inches). Constructed from brass with a zinc plating finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this fastener provides corrosion resistance and reliable conductivity in board-mounting applications. It is installed by electronics technicians, electricians, and panel builders during circuit board assembly and rack or enclosure mounting tasks.

This standoff is suited for circuit board assemblies in control panels, HVAC equipment electronics, electrical enclosures, and similar low-voltage or signal-level hardware installations. The male threaded post on one end engages the board or panel below, while the female threaded bore on the opposite end accepts a screw or the male end of a stacked standoff. This makes it well adapted to layered board configurations and applications where serviceable, repeatable spacing is required.

Key Features

• Male-female configuration allows board stacking and serviceable disassembly
• 4-40 unified thread size for compatibility with standard PCB mounting hardware
• Hex body shape allows wrench or nut-driver installation for consistent torque
• Brass base material with zinc-plated finish for corrosion resistance
• Meets ASTM B633 Type 1 and QQ-B-626 Comp 22 finish standards
• Compact 15/32 inch overall length suited to close-clearance board assemblies

Compatibility

Designed as an OEM-style replacement or new-installation fastener for circuit board mounting applications using 4-40 threaded hardware in standard hex standoff configurations.

Installation Notes

Installation is typically performed by electronics technicians or licensed electricians during panel assembly or PCB service. De-energize all circuits completely before installing or removing standoffs from live boards or enclosures. Use an appropriately sized nut driver or hex wrench on the hex body to avoid deforming the standoff. Follow applicable NEC guidelines when mounting boards inside electrical enclosures.