Electro Hardware S809-M07-F16-H Circuit Board Spacer No.8

Product Description

The ELECTRO HARDWARE S809-M07-F16-H is a round, female unthreaded circuit board spacer designed to maintain precise standoff clearance between a PCB and a mounting surface. Machined from 18-8 and 303 grade stainless steel to the QQ-S-763 fastener standard, this spacer provides corrosion resistance and dimensional stability in both indoor and light-industrial environments. It accepts a No. 8 screw, measures 0.5 inches in overall length, and features an inside diameter of 0.171 inches with an outside diameter of 0.3125 inches. The uncoated finish ensures consistent dimensional tolerances without plating buildup. Electricians, electronics technicians, and HVAC control board installers use these spacers during PCB mounting and replacement work.

This spacer is suited for residential and light-commercial applications wherever a No. 8 fastener is used to mount a circuit board. Common install scenarios include HVAC control board replacements, electrical panel sub-assemblies, and industrial PCB enclosures requiring a rigid, corrosion-resistant standoff. The round body shape and female unthreaded bore allow the spacer to sit cleanly between mounting layers, keeping boards at a fixed, repeatable height. Sold individually, it is appropriate for both single-unit repairs and small-batch assembly work.

Key Features

• Female unthreaded bore sized for No. 8 screw fasteners
• 0.5-inch overall length with a tight length tolerance of -0.005 to 0.005 inches
• Inside diameter of 0.171 inches with a tolerance of 0.000 to 0.010 inches
• Outside diameter of 0.3125 inches, round body profile
• 18-8 and 303 grade stainless steel construction, uncoated
• Meets QQ-S-763 fastener standard

Compatibility

Designed as a standard No. 8 screw-size female unthreaded round circuit board spacer suitable for PCB mounting applications requiring a 0.5-inch standoff in inch-measurement systems.

Installation Notes

Installation should be performed by a qualified electrician or electronics technician. Always de-energize and lock out the equipment before removing or installing circuit boards or associated hardware. Use hand tools sized for No. 8 fasteners and avoid overtightening, which can crack PCB mounting pads or deform the spacer bore. Follow applicable NEC guidelines and equipment manufacturer procedures when replacing control board hardware in electrical or HVAC systems.