Electro Hardware S297M10F21C Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S297M10F21C is a round, female unthreaded circuit board spacer designed to create precise standoff clearance between a PCB and a mounting surface. Machined from Grade 2 steel with a zinc-plated finish per ASTM B633 and QQ-S-633 Type 1, this spacer measures 0.3125 inches overall length, 0.1875 inches outside diameter, and 0.089 inches inside diameter. It accepts a number 2 screw and is used anywhere a low-profile, two-screw standoff solution is needed in electronic assemblies, control boards, or enclosure mounting applications. Electrical and automation technicians, control panel builders, and electronics assemblers install this hardware during board mounting and enclosure work.

This spacer is suited for residential and commercial control board assemblies, HVAC control modules, and general electronics enclosures where a compact round standoff is required. Its small outside diameter of 3/16 inches and short 5/16-inch length make it appropriate for tight board layouts with limited vertical clearance. It is sold individually with a minimum order quantity of one unit, making it practical for service replacement or low-volume assembly work.

Key Features

• Female unthreaded design accepts number 2 screws for secure two-point fastening
• Zinc-plated Grade 2 steel construction meets ASTM B633 and QQ-S-633 Type 1 standards
• Overall length of 0.3125 inches with tight length tolerance of -0.005 to 0.005 inches
• Inside diameter of 0.089 inches with tolerance of 0.000 to 0.010 inches for consistent fit
• Round body profile with 3/16-inch outside diameter suited for dense PCB layouts
• Sold as individual units with no bulk quantity requirement

Compatibility

Designed as an OEM-style replacement or service spacer for circuit board mounting applications requiring a number 2 screw, female unthreaded round standoff in the 5/16-inch length class.

Installation Notes

Installation is performed by electronics assemblers, control panel technicians, or HVAC service technicians working on control board assemblies. Always de-energize and lock out the equipment before removing or replacing circuit board hardware. Use a properly sized number 2 fastener to avoid damaging the unthreaded bore. Handle PCBs with appropriate ESD precautions to prevent damage to sensitive components during spacer installation.