Electro Hardware S561-M07-F16-E Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S561-M07-F16-E is a round, female unthreaded circuit board spacer machined from 18-8 Grade 303 stainless steel to the QQ-S-763 fastener standard. It measures 1 inch overall length with a 0.25 inch outside diameter and a 0.116 inch inside diameter, sized to accept a number 4 screw. The uncoated finish leaves the base stainless steel exposed for corrosion resistance without added plating. Electricians and electronics technicians use this type of spacer to maintain consistent standoff height between a circuit board and a mounting surface, keeping the board secure and electrically isolated from the chassis or panel.

This spacer is suited for use in control board assemblies, HVAC system controllers, electrical enclosures, and similar low-voltage electronic panel applications where a compact, corrosion-resistant standoff is required. Its inch-system dimensions make it a direct fit in standard number 4 screw mounting configurations commonly found in residential and light commercial control boards and terminal assemblies.

Key Features

• Female unthreaded body accepts a number 4 screw for clean, tool-based installation
• 18-8 Grade 303 stainless steel construction for corrosion resistance in demanding environments
• Manufactured to QQ-S-763 fastener standard for dimensional consistency
• Uncoated finish - no plating to flake or interfere with electrical clearance
• Tight length tolerance of -0.005 to 0.005 inches and ID tolerance of 0.000 to 0.010 inches for precise board standoff height
• Round body shape for uniform fitment in standard PCB mounting hole patterns

Compatibility

Designed as an OEM-style replacement or service spacer for circuit board assemblies using number 4 screw mounting hardware in inch-system configurations.

Installation Notes

This spacer is installed by electricians or electronics technicians during control board assembly or replacement work. Always de-energize the panel or control system and verify zero voltage before handling circuit boards or fasteners. Use a screwdriver or hex driver matched to the number 4 screw head to avoid stripping the fastener. Follow applicable NEC guidelines for electrical enclosure work when installing or servicing control assemblies.