Electro Hardware S1111-M10-F21-G Round Board Spacer

Product Description

The ELECTRO HARDWARE S1111-M10-F21-G is a round, female unthreaded circuit board spacer designed to maintain precise standoff distance between a printed circuit board and a mounting surface or adjacent board. Machined from Grade 2 steel with a zinc-plated finish meeting ASTM B633 and QQ-S-633 Type 1 standards, this spacer provides corrosion resistance and dimensional consistency in electronic assemblies. It measures 1 inch in overall length, 0.141 inches inside diameter, and 0.375 inches outside diameter, sized for Number 6 screw hardware. Licensed electricians, electronics technicians, and HVAC control board installers use this type of hardware when mounting PCBs in control panels, junction boxes, and equipment enclosures.

This spacer is suited for residential and light commercial applications wherever a Number 6 fastener is used to mount a circuit board. Common install scenarios include HVAC control board assemblies, electrical panel sub-mounts, and industrial enclosure PCB installations. The female unthreaded body accepts a Number 6 screw passed through a mating hole in the board, creating a stable, isolated standoff. Its round body profile and standardized dimensions make it a direct fit in applications requiring tight length and diameter tolerances.

Key Features

• Female unthreaded round body accepts Number 6 screws for straightforward board mounting
• Grade 2 steel construction with zinc-plated finish per ASTM B633 and QQ-S-633 Type 1
• 1 inch overall length with a tight length tolerance of -0.005 to 0.005 inches
• 0.141 inch inside diameter with an inside diameter tolerance of 0.000 to 0.010 inches
• 0.375 inch outside diameter provides stable seating on standard PCB mounting holes
• Inch measurement system; consistent with standard North American fastener specifications

Compatibility

Designed as an OEM-style standoff spacer for circuit board assemblies using Number 6 screw hardware in inch-measurement fastener systems.

Installation Notes

Installation is performed by electricians, electronics technicians, or qualified HVAC service professionals. De-energize all circuits and discharge any capacitors in the control board assembly before handling PCBs or fastener hardware. Use a correctly sized Number 6 screw and verify board hole alignment before seating the spacer to avoid cracking solder joints or stressing board traces. Follow applicable NEC guidelines when working inside electrical enclosures.