Electro Hardware S793-MO4-F16-G Round Board Spacer 6 Screw

Product Description

The ELECTRO HARDWARE S793-MO4-F16-G is a round, female unthreaded circuit board spacer machined from aluminum alloy grade T-3 to the QQ-A-225A Comp 2 fastener standard. It is designed to create a precise standoff gap between a printed circuit board and a mounting surface or adjacent board layer. The spacer accepts a number 6 screw, has an overall length of 0.25 inches, an inside diameter of 0.141 inches, and an outside diameter of 0.3125 inches. The uncoated aluminum finish keeps weight low while providing adequate rigidity for typical PCB mounting applications. Licensed electricians and electronics technicians are the primary installers.

This spacer is used wherever a consistent, low-profile standoff is required on a circuit board assembly. Common applications include control boards in HVAC equipment, electrical panels, and commercial electronics enclosures where a number 6 fastener pattern is specified. The female unthreaded bore accepts a mating screw passed through the board stack, allowing secure, repeatable positioning. The inch-system dimensions and QQ-A-225A material certification make it a direct fit for mil-spec and commercial-grade PCB assemblies requiring aluminum standoffs at the 5/16-inch OD form factor.

Key Features

• Female unthreaded bore sized for a number 6 screw with inside diameter of 0.141 inches
• Overall length of 0.25 inches with a tight length tolerance of -0.005 to 0.005 inches
• Outside diameter of 0.3125 inches with round body profile for consistent seating
• Aluminum grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• Uncoated finish - no added coating thickness to affect fitment or clearance
• Inside diameter tolerance of 0.000 to 0.010 inches for controlled screw engagement

Compatibility

Designed as an OEM-style replacement or new-install aluminum board spacer for circuit board assemblies requiring a number 6 screw, 0.25-inch overall length, and 0.3125-inch outside diameter in inch-system configurations.

Installation Notes

Installation is typically performed by a licensed electrician or qualified electronics technician. De-energize and lock out all power to the board assembly before servicing. Verify screw length and thread engagement depth against the assembled stack before torquing fasteners to avoid cracking the PCB substrate. Handle aluminum spacers carefully to avoid burrs that could damage board traces or affect seating.