Electro Hardware S509-M04-F16-E Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S509-M04-F16-E is a round, female unthreaded circuit board spacer machined from aluminum grade T-3 stock to QQ-A-225A Comp 2 fastener standards. It measures 0.1875 inches overall length with a 0.25 inches outside diameter and a 0.116 inches inside diameter, sized for a 4 screw. The uncoated aluminum construction keeps weight minimal and resists corrosion in standard indoor electronic enclosures. This spacer is installed by electronics technicians, PCB assembly professionals, and electrical tradespeople who need precise, repeatable standoff clearance between a circuit board and a mounting surface.

This spacer is used in circuit board mounting applications where a female unthreaded standoff is required to create controlled separation between a PCB and chassis or panel. Typical installation scenarios include control boards in HVAC equipment, industrial control panels, and other enclosures where vibration isolation and board clearance are needed. The inch-system dimensions and 4 screw sizing make it a straightforward fit in standard domestic PCB mounting layouts. Sold individually with a minimum order quantity of 5 units.

Key Features

• Female unthreaded body accepts a 4 screw for secure board standoff mounting
• Aluminum grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• 0.1875 inches overall length with tight length tolerance of -0.005 to 0.005 inches
• 0.116 inches inside diameter with inside diameter tolerance of 0.000 to 0.010 inches
• 0.25 inches outside diameter, round body profile
• Uncoated finish suitable for standard indoor electronic assembly environments

Compatibility

Designed as a standard female unthreaded round circuit board spacer for 4 screw applications in inch-system PCB mounting configurations.

Installation Notes

Installation is typically performed by electronics technicians or electricians during PCB assembly or control board service. Power down and de-energize all circuits before handling or replacing circuit board hardware. Use appropriately sized drivers or insertion tools to avoid damaging the aluminum body. Follow applicable NEC guidelines and equipment manufacturer instructions when servicing control boards inside electrical or HVAC enclosures.