Electro Hardware S797-MO4-F16-I Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S797-MO4-F16-I is a round, female unthreaded circuit board spacer designed to maintain consistent standoff distance between a PCB and a mounting surface. Machined from aluminum grade T-3 to the QQ-A-225A Comp 2 fastener standard, this spacer measures 5/16 inches overall length (0.3125 inches) with a 0.194-inch inside diameter and a 5/16-inch outside diameter. It is sized for a 10 screw and ships uncoated. Electronics assemblers, panel builders, and field technicians use this type of spacer when mounting control boards inside HVAC equipment, electrical enclosures, and similar assemblies where reliable board support is required.

This spacer is suited for light commercial and residential applications wherever a 10 screw mounting pattern is used to secure a circuit board. Typical use cases include HVAC control board installations, industrial panel assemblies, and any enclosure where aluminum construction is preferred for its weight and corrosion resistance. The female unthreaded design accepts a mating fastener from below, creating a fixed standoff between the board and the chassis surface.

Key Features

• Aluminum grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• Female unthreaded body accepts 10 screw hardware
• 5/16-inch overall length (0.3125 inches) with tight length tolerance of -0.005 to 0.005 inches
• 0.194-inch inside diameter with inside diameter tolerance of 0.000 to 0.010 inches
• Round body profile, 5/16-inch outside diameter
• Uncoated finish - no additional plating or coating to affect dimensional tolerances

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board mounting applications requiring a 10 screw, female unthreaded aluminum standoff with a 5/16-inch overall length.

Installation Notes

Installation is typically performed by electronics assemblers, HVAC technicians, or electricians during control board mounting. De-energize all circuits and discharge any capacitors in the assembly before handling PCBs or installing standoffs. Use fastener hardware matched to the 10 screw size to avoid damage to the unthreaded bore. Follow applicable NEC or equipment-manufacturer guidelines for PCB mounting clearances within electrical enclosures.