Electro Hardware S505-M07-F16-E Circuit Board Spacer No. 4

Product Description

The ELECTRO HARDWARE S505-M07-F16-E is a round, female unthreaded circuit board spacer designed to create consistent standoff clearance between a PCB and a mounting surface. Manufactured from 18-8 and 303 grade stainless steel with an uncoated finish, it meets the QQ-S-763 fastener standard. The spacer measures 0.125 inches overall length with a 0.25 inch outside diameter and a 0.116 inch inside diameter, accepting a No. 4 screw. It is a single-piece passive component installed by electronics technicians, field service engineers, and industrial electricians working on control boards and panel assemblies.

This spacer is suited for use in printed circuit board assemblies where corrosion resistance and dimensional precision are required. Its stainless steel construction makes it appropriate for light industrial environments, HVAC control boards, electrical enclosures, and panel-mount PCB applications where a No. 4 screw pattern is specified. The female unthreaded body style allows a fastener to pass through freely, providing a fixed standoff height of 0.125 inches between mating surfaces.

Key Features

• 18-8 and 303 grade stainless steel construction resists corrosion in demanding environments
• Meets QQ-S-763 federal fastener standard for stainless steel hardware
• Female unthreaded body accepts a No. 4 screw for straightforward assembly
• Tight length tolerance of -0.005 to 0.005 inches ensures consistent board standoff height
• Uncoated finish eliminates coating thickness as a variable in precision assemblies
• Round body shape with 0.25 inch OD provides stable, centered support on PCB mounting holes

Compatibility

Designed for use in printed circuit board assemblies that use a No. 4 screw pattern and require a 0.125 inch standoff clearance between the board and mounting surface.

Installation Notes

Installation is performed by electronics technicians or electricians during board assembly or field replacement of control boards. De-energize the equipment and discharge any capacitors before handling circuit board hardware. Use appropriately sized drivers to avoid deforming the board or adjacent components. Follow applicable codes and equipment manufacturer instructions for PCB servicing and reassembly.