Electro Hardware S873-MO4-F16-H Round Board Spacer Aluminum

Product Description

The ELECTRO HARDWARE S873-MO4-F16-H is a round, female unthreaded circuit board spacer machined from aluminum alloy grade T-3. It is designed to create a fixed standoff gap between a printed circuit board and a mounting surface, maintaining proper clearance and reducing vibration contact. With an overall length of 1.5 inches, an inside diameter of 0.171 inches, and an outside diameter of 0.3125 inches (5/16 inches), this spacer is sized for No. 8 screw hardware. It meets fastener standard QQ-A-225A Comp 2 and ships uncoated. Electronics assemblers, HVAC control board technicians, and electrical panel builders commonly install this type of hardware during board mounting and service.

This spacer is suited for residential and light commercial applications wherever a printed circuit board requires a rigid, non-threaded standoff. Typical use cases include mounting control boards in HVAC equipment, electrical enclosures, and industrial panel assemblies. The aluminum construction keeps weight low while providing adequate structural support. It is sold individually and is compatible with No. 8 screw installations requiring a 1.5-inch standoff height.

Key Features

• Female unthreaded body accepts No. 8 screw hardware for secure board mounting
• Overall length of 1.5 inches provides consistent standoff clearance
• Inside diameter of 0.171 inches with a tolerance of 0.000 to 0.010 inches
• Outside diameter of 0.3125 inches (5/16 inches) for compact footprint
• Aluminum grade T-3 construction per fastener standard QQ-A-225A Comp 2
• Uncoated finish; suitable for standard indoor electronic assembly environments

Compatibility

Designed for use in No. 8 screw circuit board mounting applications requiring a female unthreaded round spacer with a 1.5-inch standoff length.

Installation Notes

Power down and de-energize all circuits before handling or replacing circuit board hardware. This spacer is installed by electronics assemblers or qualified technicians using standard hand tools. Verify screw size and board hole dimensions before installation to ensure proper fit. Avoid over-tightening fasteners through the unthreaded bore, as this can crack the board or deform the spacer.