Electro Hardware S309M04F16E Circuit Board Spacer 4 Screw

Product Description

The ELECTRO HARDWARE S309M04F16E is a round, female unthreaded circuit board spacer designed to provide precise standoff spacing between a PCB and a mounting surface or adjacent board. Machined from Aluminum Grade T3 to the QQ-A-225A Comp 2 fastener standard, this spacer delivers reliable dimensional consistency in demanding electronic assembly environments. It accepts a 4 screw and measures 0.5 inches in overall length, with a 0.1875-inch outside diameter and a 0.116-inch inside diameter. The bright, uncoated finish keeps the part inspection-ready and free from coating buildup that could affect tolerances. Electronics assembly technicians and field service techs working on control boards in HVAC, electrical, and related trade equipment rely on precision spacers like this to maintain correct PCB clearance and secure mechanical mounting.

This spacer is suited for use in residential and light commercial electronic assemblies where a 4 screw standoff is required. Typical applications include circuit board mounting in HVAC control panels, electrical equipment enclosures, and industrial equipment chassis. The female unthreaded design allows the screw to pass through and seat from the opposing side, making it appropriate for through-fastener PCB stack-up configurations. Its compact outside diameter of 0.1875 inches makes it well suited for densely populated board layouts where space between mounting points is limited.

Key Features

• Female unthreaded round body accepts 4 screws for through-fastener PCB mounting
• Aluminum Grade T3 construction per QQ-A-225A Comp 2 fastener standard
• Overall length of 0.5 inches with a tight length tolerance of -0.005 to 0.005 inches
• Inside diameter of 0.116 inches with a tolerance of 0.000 to 0.010 inches for consistent screw fit
• Bright, uncoated finish maintains dimensional integrity without coating thickness variation
• Compact 0.1875-inch outside diameter fits dense PCB mounting configurations

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board assemblies requiring a 4 screw, female unthreaded aluminum standoff with a 0.5-inch overall length.

Installation Notes

Installation is typically performed by electronics assembly technicians or field service personnel working on control board assemblies. De-energize and lock out all electrical power to the equipment before handling or replacing any circuit board hardware. Use the appropriate 4 fastener and ensure screw engagement does not exceed the inside diameter tolerance range to avoid cracking or deforming the spacer body. Follow applicable NEC guidelines and equipment manufacturer documentation when reassembling control panels or PCB enclosures.