Electro Hardware S561-M04-F16-G Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S561-M04-F16-G 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 inch overall length with an outside diameter of 0.25 inches and an inside diameter of 0.141 inches, sized for number 6 screw applications. The uncoated finish leaves the aluminum bare, suitable for environments where conductivity or weight savings matter. Electricians, electronics technicians, and PCB assembly professionals use this spacer to maintain precise standoff distance between a circuit board and a mounting surface, preventing electrical shorts and providing mechanical support.

This spacer is used in residential, commercial, and light industrial electronics assembly wherever a number 6 screw standoff is required. Typical applications include mounting printed circuit boards inside HVAC control panels, electrical enclosures, and similar assemblies. The female unthreaded body accepts a mating screw through the board stack, allowing clean, repeatable board-to-chassis spacing. The round body shape and consistent tolerances on both length and bore make it straightforward to source as a direct replacement or for new assembly work. It is sold individually with a minimum order quantity of 5 units.

Key Features

• Female unthreaded round body sized for number 6 screws
• 1 inch overall length with a tight length tolerance of -0.005 to 0.005 inches
• 0.141 inch inside diameter with bore tolerance of 0.000 to 0.010 inches
• 0.25 inch outside diameter for compact board spacing
• Aluminum grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• Uncoated finish - no added plating or coating that could affect conductivity or fit

Compatibility

Designed as an OEM-style replacement or new-build component for printed circuit board assemblies requiring a number 6 screw, female unthreaded round spacer with a 1 inch standoff height.

Installation Notes

Installation is typically performed by electronics technicians or electricians during board assembly or panel wiring. Power down and de-energize all circuits before working inside any enclosure. Use hand tools appropriate for number 6 fasteners and avoid over-torquing, which can deform the unthreaded aluminum bore. Verify board standoff height and hole alignment before finalizing the fastener stack.