Electro Hardware S1407-M04-F16-K Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1407-M04-F16-K is a round, female unthreaded circuit board spacer machined from aluminum grade T-3 to the QQ-A-225A Comp 2 fastener standard. It measures 1.25 inches overall length with a 0.257 inch inside diameter, a 0.500 inch outside diameter, and is sized for a 1/4 inch screw. The uncoated finish leaves the aluminum bare, which suits applications where coating thickness or outgassing could be a concern. Inside diameter tolerance runs 0.000 to 0.010 inches and length tolerance is held to plus or minus 0.005 inches, making this spacer appropriate where precise board standoff height matters.

This spacer is used to mount printed circuit boards to chassis, panels, or enclosures in electronic assemblies across HVAC control boards, industrial controls, and electrical equipment. It creates a fixed standoff gap between the PCB and the mounting surface, protecting solder joints and components from contact with metallic surfaces. Electricians, controls technicians, and electronics assembly professionals install this type of hardware during board replacement or original assembly work on equipment requiring precise standoff dimensions.

Key Features

• Female unthreaded body accepts a 1/4 inch screw for through-fastener mounting
• Aluminum grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• 1.25 inch overall length provides consistent PCB standoff height
• Inside diameter tolerance of 0.000 to 0.010 inches for controlled fit
• Length tolerance of plus or minus 0.005 inches for precise board positioning
• Uncoated finish eliminates coating thickness variables in tight-clearance assemblies

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board mounting applications requiring a 1/4 inch screw size, 1.25 inch standoff height, and 0.500 inch outside diameter in round aluminum hardware.

Installation Notes

This spacer is installed by electronics assembly technicians, controls technicians, or licensed electricians during PCB mounting or replacement. Always de-energize and discharge the equipment before handling circuit boards or fasteners. Use a correctly sized driver to avoid stripping the mating screw, and verify board standoff height matches the assembly specification before final torque. Refer to the equipment manufacturer service documentation for mounting pattern and hardware requirements.