Electro Hardware S817-MO4-F16-E Round Pcb Spacer Aluminum

Product Description

The ELECTRO HARDWARE S817-MO4-F16-E is a round, female unthreaded aluminum circuit board spacer designed to maintain consistent standoff distance between a PCB and its mounting surface. Built to a 0.625-inch overall length with a 0.3125-inch outside diameter and a 0.116-inch inside diameter, this spacer is sized for number 4 screw hardware. The body is machined from Aluminum Grade T-3 per fastener standard QQ-A-225A Comp 2 and is left uncoated. Electricians, electronics technicians, and field service pros use these spacers when mounting control boards inside HVAC equipment, electrical enclosures, and similar assemblies.

This spacer is suited for residential and light commercial applications wherever a number 4 screw is used to secure a circuit board. Common install scenarios include mounting PCBs inside furnace control compartments, air handler electrical panels, variable-speed drive enclosures, and other tight-tolerance board mounting situations. The female unthreaded design accepts a mating screw passed through the board and into the spacer bore, keeping the board elevated and thermally isolated from the mounting plate.

Key Features

• Female unthreaded round body accepts number 4 hardware for secure PCB standoff mounting
• 0.625-inch overall length with tight length tolerance of -0.005 to 0.005 inches for consistent stack height
• 0.116-inch inside diameter with bore tolerance of 0.000 to 0.010 inches for precise screw fitment
• Aluminum Grade T-3 construction per QQ-A-225A Comp 2 for lightweight, corrosion-resistant performance
• Uncoated finish maintains dimensional accuracy without added coating thickness
• Inch measurement system; sold individually with no minimum order requirement

Compatibility

Designed for use with number 4 screw fasteners in standard inch-system PCB mounting applications. Fits assemblies requiring a round female unthreaded spacer with a 0.3125-inch outside diameter and 0.625-inch standoff height.

Installation Notes

Installation is typically performed by an electronics technician or licensed electrician. De-energize the equipment and discharge any capacitors before handling or replacing circuit board hardware. Use properly sized number 4 screws and avoid overtightening, which can crack board mounting holes or deform the spacer bore. Installations inside electrical enclosures should follow applicable NEC guidelines for panel and board mounting.