Electro Hardware S793-MO4-F16-H Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S793-MO4-F16-H is a round, female unthreaded circuit board spacer designed to maintain precise separation between a PCB and a mounting surface or adjacent board. Machined from aluminum grade T-3 to the QQ-A-225A Comp 2 fastener standard, it accepts a number 8 screw and measures 0.25 inches in overall length with a 0.3125-inch outside diameter and a 0.171-inch inside diameter. The uncoated finish keeps the profile clean for installations where electrical conductivity or thermal contact with the aluminum body is acceptable. Licensed electronics technicians and board-level assembly techs are the typical installers.

This spacer is used in electrical and electronic control assemblies where boards must be mounted at a fixed, consistent standoff height. Applications include industrial control panels, HVAC control boards, electrical enclosures, and any equipment requiring rigid PCB mounting with a through-hole number 8 fastener. Its compact 0.25-inch length suits tight enclosures where minimal board clearance is required. The aluminum construction keeps weight low while providing structural rigidity for the mounted board.

Key Features

• Female unthreaded design accepts a number 8 screw for straightforward through-bolt assembly
• 0.25-inch overall length with a tight length tolerance of -0.005 to 0.005 inches for consistent board standoff height
• 0.3125-inch outside diameter and 0.171-inch inside diameter with an 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 - no additional coating buildup to affect dimensional fit
• Round body shape for uniform seating against PCB mounting holes

Compatibility

Designed as an OEM-style replacement or service spacer for circuit board mounting applications requiring a female unthreaded round aluminum spacer with a number 8 screw size and 0.25-inch standoff length.

Installation Notes

Installation is performed by licensed electricians or electronics technicians during panel assembly or board-level service. De-energize all circuits and discharge any capacitors before handling or repositioning control boards. Use appropriately sized drivers to avoid stripping the mating fastener, and do not overtighten, as aluminum spacers are susceptible to deformation under excess load. Verify board standoff height requirements against the assembly drawing before selecting spacer length.