Electro Hardware S1383-M04-F16-H Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1383-M04-F16-H is a round, female unthreaded circuit board spacer machined from aluminum to T-3 grade stock conforming to fastener standard QQ-A-225A Comp 2. It measures 0.875 inches in overall length with a 0.5-inch outside diameter and a 0.171-inch inside diameter sized for a No. 8 screw. The uncoated finish leaves the aluminum in its natural state, suitable for most indoor electronic enclosure environments. Electricians, electronics technicians, and control-board service professionals install this spacer to maintain precise standoff distances between printed circuit boards and mounting surfaces or between stacked boards within enclosures.

This spacer is used wherever a No. 8 fastener is needed to secure or stack circuit boards in control panels, HVAC system boards, electrical enclosures, and similar assemblies. Its compact 0.5-inch outside diameter fits standard PCB mounting hole layouts without interfering with nearby components. The female unthreaded bore accepts a No. 8 screw passed through from the board side, making it a straightforward fit for typical panel-mount configurations in both residential and light commercial equipment.

Key Features

• Aluminum T-3 grade construction per fastener standard QQ-A-225A Comp 2
• 0.875-inch overall length with a length tolerance of -0.005 to 0.005 inches
• 0.5-inch outside diameter with a 0.171-inch inside diameter for No. 8 screw clearance
• Inside diameter tolerance of 0.000 to 0.010 inches for consistent fitment
• Female unthreaded, round body - no tapping required
• Uncoated finish; no added plating or coating that could alter dimensional tolerances

Compatibility

Designed as a standard-inch-series circuit board spacer for No. 8 screw applications in PCB mounting, panel assembly, and electronic enclosure installations where a 0.875-inch standoff height and 0.5-inch outside diameter are required.

Installation Notes

Installation is performed by electricians or electronics technicians during board assembly or replacement. Power down and de-energize all circuits before working inside any control panel or enclosure. Use hand tools appropriate for No. 8 fasteners and avoid over-torquing, which can crack or deform the aluminum spacer body. Verify that the selected screw length accounts for the full 0.875-inch spacer height plus the board and mounting surface thicknesses.