Electro Hardware S325M07F16E Round Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S325M07F16E is a round, female unthreaded circuit board spacer designed to maintain precise clearance between a PCB and its mounting surface. Machined from Grade 303 stainless steel and left uncoated with a bright finish, this spacer meets the QQ-S-763 fastener standard. It accepts a No. 4 screw, measures 0.75 inches overall length, and has an inside diameter of 0.116 inches with an outside diameter of 0.1875 inches. Licensed electricians, electronics technicians, and board-level service professionals use this type of fastener hardware when assembling or servicing control boards in HVAC equipment, industrial panels, and similar enclosures.

This spacer is suited for applications requiring a compact, corrosion-resistant standoff between a circuit board and a chassis or mounting plate. The stainless steel construction makes it appropriate for environments with exposure to moisture or mild chemicals. It is used in both original-equipment manufacturing and field-service scenarios where a No. 4 screw pattern is specified. The female unthreaded design accepts a No. 4 fastener passed through from the board side, allowing the screw to set the clamping load directly.

Key Features

• Grade 303 stainless steel construction meeting QQ-S-763 fastener standard
• Female unthreaded body accepts No. 4 screw
• Overall length of 0.75 inches with a length tolerance of -0.005 to 0.005 inches
• Inside diameter of 0.116 inches with a tolerance of 0.000 to 0.010 inches
• Outside diameter of 0.1875 inches in a round body profile
• Bright uncoated finish suitable for electrically conductive grounding contact

Compatibility

Designed as an OEM-style circuit board spacer for applications requiring a No. 4 screw, round body profile, and 0.75-inch standoff height in stainless steel.

Installation Notes

Installation is typically performed by a licensed electrician or electronics technician. De-energize and lock out all power to the control board assembly before handling or replacing spacers. Use a calibrated torque driver appropriate for No. 4 fasteners to avoid over-stressing the board substrate. Follow applicable NEC guidelines and equipment manufacturer instructions when reassembling control board enclosures.