Electro Hardware S517-M07-F16-E Circuit Board Spacer 4 Ss

Product Description

The ELECTRO HARDWARE S517-M07-F16-E is a round, female unthreaded circuit board spacer designed to create a fixed standoff distance between a PCB and a mounting surface. Machined from Grade 18-8 303 stainless steel and left uncoated, it provides corrosion resistance in environments where mild moisture or chemical exposure is a factor. The spacer measures 0.3125 inches overall length with an outside diameter of 0.25 inches and an inside diameter of 0.116 inches, sized for a No. 4 screw. It conforms to fastener standard QQ-S-763. Electronics technicians and panel builders use this type of hardware to achieve consistent board clearance and prevent grounding issues caused by contact between the PCB and the chassis.

This spacer is suited for use in control panel assemblies, HVAC control boards, electrical enclosures, and similar low-voltage electronics installations where a No. 4 fastener is specified. The female unthreaded design accepts a No. 4 screw passed through the bore without threading engagement in the spacer body itself, making it appropriate for through-bolt or captured-fastener mounting configurations. Its stainless steel construction makes it a reliable choice in light commercial and residential equipment panels where longevity and dimensional consistency are required.

Key Features

• Grade 18-8 303 stainless steel construction for corrosion resistance and dimensional stability
• Female unthreaded bore accepts No. 4 screw, conforming to QQ-S-763 fastener standard
• Overall length of 0.3125 inches with a tight length tolerance of -0.005 to 0.005 inches
• Outside diameter of 0.25 inches and inside diameter of 0.116 inches with an ID tolerance of 0.000 to 0.010 inches
• Round body profile for consistent seating and predictable standoff height
• Uncoated finish - no plating or coating to crack, chip, or interfere with conductivity requirements

Compatibility

Designed as an OEM-style replacement or stock component for circuit board mounting applications requiring a No. 4 screw female unthreaded round spacer in inch measurements.

Installation Notes

Installation is typically performed by electronics technicians, panel builders, or field service technicians during board mounting or replacement procedures. De-energize and lock out the panel or equipment before handling circuit boards or installing standoff hardware. Use a No. 4 fastener that matches the board or chassis specification - do not force oversized hardware through the bore. Verify standoff height requirements against the PCB layout before selecting quantity and placement.