Electro Hardware S513-M07-F16-E Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S513-M07-F16-E is a round, female unthreaded circuit board spacer machined from 18-8 303 stainless steel to QQ-S-763 fastener standards. It measures 0.25 inches in overall length and 0.25 inches in outside diameter, with an inside diameter of 0.116 inches sized to accept a No. 4 screw. The uncoated finish leaves the stainless bare, relying on the corrosion resistance of the 18-8 alloy rather than a secondary coating. Electronics technicians and field service pros use these spacers to maintain consistent standoff clearance between a printed circuit board and its mounting surface.

This spacer is appropriate for use in control board assemblies found across residential and light commercial equipment, including HVAC control boards, motor drive modules, and similar low-voltage electronic enclosures where a No. 4 fastener pattern is specified. The round body profile and tight length tolerance of plus or minus 0.005 inches make it well suited to applications where consistent board height is required across multiple mounting points.

Key Features

• Female unthreaded round body accepts No. 4 screws
• Overall length of 0.25 inches with length tolerance of -0.005 to 0.005 inches
• Outside diameter of 0.25 inches; inside diameter of 0.116 inches with tolerance of 0.000 to 0.010 inches
• 18-8 303 stainless steel construction meets QQ-S-763 fastener standard
• Uncoated finish - no secondary plating or coating applied
• Inch measurement system; sold individually

Compatibility

Designed as a standard No. 4 screw circuit board spacer for use in electronic control board mounting applications where a 0.25-inch standoff height and 0.25-inch outside diameter are required.

Installation Notes

Installation is typically performed by electronics technicians or field service personnel during control board replacement or assembly. De-energize all affected circuits and discharge any capacitors before handling circuit boards or fasteners. Use appropriately sized No. 4 hardware and avoid over-tightening, which can crack board substrate or distort the spacer. Follow applicable equipment manufacturer torque guidance and relevant electrical codes when reassembling control enclosures.