Electro Hardware S529-M07-F16-E Circuit Board Spacer No. 4

Product Description

The ELECTRO HARDWARE S529-M07-F16-E is a round, female unthreaded circuit board spacer designed to separate and support PCBs within electronic enclosures and control assemblies. Machined from 18-8 Grade 303 stainless steel and left uncoated per QQ-S-763, this spacer delivers corrosion resistance without added coating buildup. It measures 0.5 inches overall length with an inside diameter of 0.116 inches and an outside diameter of 0.25 inches, sized for No. 4 screw hardware. HVAC technicians, electricians, and control system integrators use this style of spacer when mounting control boards in residential and light commercial equipment.

This spacer is suited for use in circuit board mounting applications where a No. 4 thread fastener is specified. The female unthreaded bore accepts a No. 4 screw passed through the board, allowing the spacer to stand off the board from a mounting surface or chassis. Common applications include HVAC control boards, low-voltage control panels, and electrical enclosures where stainless steel hardware is required for corrosion-prone or washdown environments.

Key Features

• 18-8 Grade 303 stainless steel construction for corrosion resistance
• Female unthreaded design accepts No. 4 screws
• 0.5 inches overall length for consistent board standoff height
• 0.116 inches inside diameter with tolerance of 0.000 to 0.010 inches
• 0.25 inches outside diameter with round body profile
• Uncoated finish per QQ-S-763 fastener standard
• Length tolerance held to -0.005 to 0.005 inches for precise stacking

Compatibility

Designed as an OEM-style circuit board spacer for control board mounting assemblies requiring a No. 4 screw, female unthreaded, round-body standoff in 0.5 inches overall length.

Installation Notes

Installation is performed by electricians or electronics technicians during control board assembly or replacement. Power down and de-energize the control panel before removing or seating circuit boards. Use a No. 4 fastener only, as mismatched hardware can crack the PCB or strip the standoff bore. Ensure the mounting surface is clean and flat so the spacer seats squarely and maintains the specified standoff height.