Electro Hardware S317M10F21E Circuit Board Spacer 5/8 in

Product Description

The ELECTRO HARDWARE S317M10F21E is a round, female unthreaded circuit board spacer designed to create precise standoff clearance between a PCB and a mounting surface. Built from Grade 2 steel with a zinc-plated finish per ASTM B633 and QQ-S-633 Type 1, this spacer provides corrosion resistance in typical panel and enclosure environments. It accepts a No. 4 screw and measures 0.625 inches overall length, with an inside diameter of 0.116 inches and an outside diameter of 0.1875 inches. Electronics assembly technicians and field service professionals use it when mounting control boards in HVAC equipment, electrical enclosures, and similar applications.

This spacer is suited for use in residential and light commercial applications wherever a No. 4 fastener is used to mount a circuit board. Common installation scenarios include furnace control board mounting, packaged unit electronics bays, and general electrical enclosure assemblies. The inch-system dimensions and standard No. 4 screw sizing make it a straightforward fit for domestic OEM-style control board installations. Sold individually, it is appropriate for single-unit service calls or small repair jobs requiring exact replacement of an existing standoff spacer.

Key Features

• Female unthreaded round body accepts No. 4 screw for clean board standoff mounting
• Grade 2 steel construction provides reliable mechanical strength for panel and enclosure use
• Zinc-plated finish meets ASTM B633 and QQ-S-633 Type 1 for corrosion protection
• 0.625 inch overall length with tight length tolerance of -0.005 to 0.005 inches for consistent board clearance
• Inside diameter tolerance of 0.000 to 0.010 inches ensures reliable fastener fit
• Inch-system dimensions for straightforward compatibility with domestic hardware and tooling

Compatibility

Designed as an OEM-style replacement or service spacer for circuit board mounting applications using No. 4 screw hardware in standard inch-system enclosures and control panels.

Installation Notes

Installation is performed by electronics assembly technicians or field service professionals working on control boards in de-energized equipment. Always disconnect power and verify zero voltage at the board before removing or replacing standoff spacers. Use a hand driver sized for No. 4 fasteners to avoid overloading the unthreaded female body. Follow applicable equipment manufacturer guidelines for board mounting torque and clearance requirements.