Electro Hardware S1079-M10-F21-G Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1079-M10-F21-G is a round, female unthreaded circuit board spacer designed for No. 6 screw applications in printed circuit board assemblies. Manufactured from Grade 2 steel with a zinc-plated finish per ASTM B633 and QQ-S-633 Type 1, this spacer provides a durable, corrosion-resistant standoff between a PCB and a mounting surface or stacking board. It measures 0.5 inches in overall length, with a 0.375 inch outside diameter and a 0.141 inch inside diameter. Electricians, electronics technicians, and controls installers use this type of spacer when precise board clearance and secure fastening are required in panel or enclosure builds.

This spacer is suited for use in low-voltage control panels, HVAC equipment boards, electrical enclosures, and other assemblies where circuit boards must be mounted at a fixed standoff height. Its female unthreaded bore accepts a No. 6 screw passed through from the opposite side, making it a straightforward component in both OEM production and field repair scenarios. The zinc-plated finish helps resist oxidation in typical indoor panel environments.

Key Features

• Female unthreaded bore sized for No. 6 screw fasteners
• 0.5 inch overall length provides consistent board standoff height
• Grade 2 steel construction for reliable structural integrity
• Zinc-plated finish per ASTM B633 and QQ-S-633 Type 1 for corrosion resistance
• Round body shape with 0.375 inch outside diameter for stable seating
• Inside diameter tolerance of 0.000 to 0.010 inches and length tolerance of -0.005 to 0.005 inches for precise fit

Compatibility

Designed for use with No. 6 screw fasteners in standard inch-measurement circuit board mounting applications requiring a female unthreaded round spacer at 0.5 inches overall length.

Installation Notes

Installation is typically performed by electricians or controls technicians during panel assembly or board replacement. Power down and de-energize the enclosure fully before handling circuit boards or installing spacers. Use appropriately sized No. 6 screws and avoid overtightening, which can crack PCB mounting pads. Follow applicable NEC guidelines for enclosure and panel work.