Electro Hardware S801-MO4-F16-H Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S801-MO4-F16-H is a round, female unthreaded circuit board spacer machined from aluminum grade T-3 to the QQ-A-225A Comp 2 fastener standard. It measures 0.375 inches overall length with an outside diameter of 0.3125 inches and an inside diameter of 0.171 inches, sized for a number 8 screw. The uncoated aluminum construction keeps the part lightweight and electrically manageable in board-level assemblies. Technicians and assemblers use these spacers to maintain precise standoff distances between a printed circuit board and a mounting surface, ensuring consistent clearance and mechanical support across the assembly.

This spacer is suited for use in electronic assemblies across HVAC control boards, electrical enclosures, and similar panel-mounted circuit board applications where a number 8 fastener is specified. Its inch-system dimensions and aluminum material make it a common fit in residential and light commercial equipment builds as well as OEM repair scenarios. Because it is female unthreaded, it accepts a mating screw from the board side without threading the spacer body itself, simplifying installation in tight PCB layouts.

Key Features

• Female unthreaded round body accepts number 8 screws for secure board standoff mounting
• Aluminum grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• 0.375 inches overall length with a length tolerance of -0.005 to 0.005 inches
• 0.3125 inches outside diameter and 0.171 inches inside diameter with an ID tolerance of 0.000 to 0.010 inches
• Uncoated finish - no additional surface treatment to interfere with grounding or board clearance requirements
• Inch-system dimensioning for compatibility with standard North American fastener sizing

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board assemblies that specify a number 8 screw, 0.375-inch standoff height, and 0.3125-inch outside diameter in aluminum.

Installation Notes

Installation is typically performed by electronics technicians or electricians during control board assembly, replacement, or repair. De-energize all circuits and discharge any stored voltage before handling circuit boards or installing spacers. Standard hand tools are sufficient; no special torque equipment is required for unthreaded spacer placement. Follow applicable NEC guidelines and equipment manufacturer instructions when servicing control board assemblies inside electrical or HVAC equipment.