Electro Hardware S373M07F16E Round Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S373M07F16E is a round, female unthreaded circuit board spacer designed to maintain precise standoff distances between a PCB and its mounting surface. Machined from Grade 303 stainless steel and left bright uncoated, this spacer meets the QQ-S-763 fastener standard. It accepts a Number 4 screw, measures 1.5 inches overall length, 0.116 inches inside diameter, and 0.1875 inches outside diameter. The tight inside diameter tolerance of 0.000 to 0.010 inches and length tolerance of -0.005 to 0.005 inches make it suited for assemblies where stack height consistency matters. Electrical and electronics technicians use this hardware in control board installations across HVAC, industrial, and commercial panel applications.

This spacer is used wherever a Number 4 fastener is required to secure and space a circuit board from a chassis or enclosure wall. Its corrosion-resistant stainless steel construction makes it appropriate for both indoor and light-duty environments where longevity and dimensional stability are priorities. HVAC technicians, electricians, and electronics assembly professionals will find this spacer relevant for control board mounting tasks in residential and light commercial equipment. It ships individually and is packaged as a single unit.

Key Features

• Grade 303 stainless steel construction for corrosion resistance and machinability
• Meets QQ-S-763 fastener standard for dimensional and material compliance
• Female unthreaded body accepts Number 4 screw fasteners
• Overall length of 1.5 inches with tight length tolerance of -0.005 to 0.005 inches
• Inside diameter of 0.116 inches with tolerance of 0.000 to 0.010 inches
• Bright uncoated finish suitable for assemblies requiring bare metal contact or grounding continuity

Compatibility

Designed for use with Number 4 screw fasteners in inch-measurement PCB standoff applications where a female unthreaded round spacer meeting QQ-S-763 is specified.

Installation Notes

Installation is typically performed by electronics technicians or licensed electricians during control board assembly or replacement. Power down and de-energize all circuits before handling or repositioning circuit boards. Use calibrated torque-limiting tools when driving Number 4 screws through this spacer to avoid deforming the unthreaded bore. Verify stack height and clearance requirements against the board layout before finalizing fastener seating.