Electro Hardware S809-M07-F16-E Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S809-M07-F16-E is a round, female unthreaded circuit board spacer designed to maintain consistent standoff distance between a PCB and a mounting surface. Built from 18-8 / 303 stainless steel per the QQ-S-763 fastener standard, it delivers corrosion resistance and mechanical stability in tight electrical enclosures. The spacer measures 0.5 inches overall length with a 0.3125-inch outside diameter and a 0.116-inch inside diameter sized for a 4 screw. It ships uncoated, ready for immediate installation. Electricians and electronics technicians use this spacer when securing control boards, relay panels, and similar PCB assemblies inside HVAC, electrical, and automation enclosures.

This spacer is suited for residential and light commercial control board mounting applications where a 4 fastener and a 0.5-inch standoff height are specified. It is commonly installed in HVAC control panels, motor drives, and electrical enclosures that require a corrosion-resistant, dimensionally precise standoff. The female unthreaded body accepts a screw through the board from above, bearing down on the spacer to secure the board at the correct height above the chassis or sub-panel surface.

Key Features

• 18-8 / 303 stainless steel construction per QQ-S-763 for corrosion resistance in demanding enclosure environments
• Female unthreaded body sized for a 4 screw, 0.116-inch inside diameter
• 0.5-inch overall length with a tight length tolerance of -0.005 to 0.005 inches
• 5/16-inch (0.3125-inch) outside diameter in a compact round body profile
• Uncoated finish - no outgassing or coating contamination risk near sensitive PCB components
• Inside diameter tolerance of 0.000 to 0.010 inches for consistent fastener fit

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit boards requiring a 4 screw, female unthreaded, round standoff with a 0.5-inch overall length.

Installation Notes

Installation is performed by licensed electricians or qualified electronics technicians. Always de-energize and lock out the enclosure before handling any control board or PCB assembly. Use the correct 4 fastener to avoid stripping the mating threads or deforming the spacer bore. Verify the installed spacer height provides adequate clearance between the PCB and chassis to prevent electrical shorts.