Electro Hardware S825-MO4-F16-E Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S825-MO4-F16-E is a round, female unthreaded circuit board spacer designed to create precise standoff clearance between a printed circuit board and a mounting surface. Machined from Aluminum Grade T-3 per fastener standard QQ-A-225A Comp 2, this spacer delivers consistent dimensional accuracy with an overall length of 0.75 inches, an inside diameter of 0.116 inches, and an outside diameter of 0.3125 inches. The uncoated finish leaves the aluminum bare, making it suitable for applications where coating buildup or conductivity interference would be a concern. It is sized for a Number 4 screw and ships individually.

This spacer is used wherever a Number 4 fastener is required to mount a circuit board at a fixed standoff height from a chassis, enclosure panel, or secondary board. Typical applications include HVAC control board assemblies, electrical enclosure subpanels, and light commercial or residential electronic equipment. The female unthreaded bore accepts a mating screw passed through from one side, providing a clean, consistent stack height without threading into the spacer body itself.

Key Features

• Female unthreaded round body accepts Number 4 screw hardware
• Overall length of 0.75 inches provides consistent PCB standoff height
• Inside diameter of 0.116 inches with a tolerance of 0.000 to 0.010 inches
• Outside diameter of 0.3125 inches with length tolerance of -0.005 to 0.005 inches
• Aluminum Grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• Uncoated finish - no coating buildup that could affect fit or clearance

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board mounting applications requiring a Number 4 screw, female unthreaded round standoff with a 0.75-inch overall length.

Installation Notes

Circuit board spacers of this type are typically installed by electronics technicians or licensed electricians working on control board assemblies. Power down and lock out the equipment before handling any circuit board or its mounting hardware. Use care not to overtighten the mating screw, as aluminum spacers can deform under excessive clamping load. Verify standoff height requirements against the board and enclosure specifications before installation.