Electro Hardware S833-MO4-F16-E Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S833-MO4-F16-E is a round, female unthreaded circuit board spacer designed to provide precise standoff spacing between PCBs and mounting surfaces in electronic assemblies. Machined from aluminum grade T-3 to the QQ-A-225A Comp 2 fastener standard, it accepts a number 4 screw and measures 0.875 inches in overall length with a 0.3125-inch outside diameter and a 0.116-inch inside diameter. The uncoated finish keeps the profile clean and dimensionally consistent. Electricians, electronics technicians, and panel builders use spacers like this when assembling control boards, relay panels, and circuit board mounting frames where repeatable standoff height and secure fastening are required.

This spacer is suited for residential and commercial electronic control assemblies, HVAC control boards, relay panels, and general PCB mounting applications where a number 4 fastener is used. Its compact outside diameter of 0.3125 inches and tight length tolerance of plus or minus 0.005 inches make it a reliable choice for precision-sensitive board layouts. The female unthreaded body accepts a number 4 screw passed through from the board side, drawing the board firmly against the spacer shoulder.

Key Features

• Female unthreaded round body accepts number 4 screw for secure PCB standoff mounting
• Overall length of 0.875 inches with length tolerance of -0.005 to 0.005 inches for repeatable standoff height
• Outside diameter of 0.3125 inches and inside diameter of 0.116 inches with inside diameter tolerance of 0.000 to 0.010 inches
• Aluminum grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• Uncoated finish maintains dimensional accuracy without added coating thickness
• Inch measurement system; sold individually

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board mounting applications requiring a number 4 screw, round body, female unthreaded aluminum standoff.

Installation Notes

Installation is performed by electronics technicians or electricians during control board assembly or replacement. De-energize all circuits before handling circuit boards or installing standoff hardware. Use a number 4 screw of appropriate length for the board stack-up; do not overtighten, as aluminum spacers can deform under excessive clamp load. Follow applicable electrical codes and board manufacturer mounting guidelines when positioning spacers.