Electro Hardware S1347-M10-F21-H Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1347-M10-F21-H is a round, female unthreaded circuit board spacer designed for use with number 8 screws. Manufactured from Grade 2 steel with a zinc-plated finish, this spacer provides reliable electrical isolation and mechanical standoff between a circuit board and a mounting surface. It measures 0.3125 inches overall length, 0.171 inches inside diameter, and 0.5 inches outside diameter. The zinc plating meets ASTM B633 and QQ-S-633 Type 1 standards, providing corrosion resistance in light-duty service environments. Licensed electricians, HVAC technicians, and electronics assembly professionals install these spacers during control board mounting procedures in residential and commercial equipment.

This spacer is suited for use in printed circuit board assemblies where a standoff gap is required between the board and a chassis or enclosure wall. The female unthreaded bore accepts a number 8 fastener, making it compatible with standard control boards found in HVAC equipment, electrical enclosures, and similar trade applications. Its compact round body shape and inch-system dimensions make it a straightforward fit for original equipment replacements or new panel builds requiring a low-profile steel standoff solution.

Key Features

• Female unthreaded design accepts number 8 screw fasteners
• Grade 2 steel construction for dependable mechanical strength
• Zinc-plated finish meets ASTM B633 and QQ-S-633 Type 1 corrosion-resistance standards
• Inside diameter tolerance of 0.000 to 0.010 inches for consistent fastener fit
• Length tolerance of -0.005 to 0.005 inches for precise board standoff height
• Round body shape; sold in single-piece quantity with no minimum order above one unit

Compatibility

Designed as an OEM-style replacement or new-installation standoff for circuit board assemblies requiring a number 8 screw, female unthreaded, round steel spacer with a 0.3125-inch overall length and 0.5-inch outside diameter.

Installation Notes

Electricians and HVAC technicians should de-energize all equipment and discharge any stored electrical energy before handling or replacing circuit board hardware. Inspect the mounting surface and board mounting holes for damage before installation. Use hand tools appropriate for number 8 fasteners and avoid over-torquing, which can crack the circuit board substrate. Work should comply with applicable NEC requirements and equipment manufacturer guidelines.