Electro Hardware S1359-M01-F21-K Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1359-M01-F21-K is a round, female unthreaded circuit board spacer machined from brass and finished with a zinc plating. It is designed to create a fixed standoff distance between a printed circuit board and a mounting surface or between stacked boards. The spacer accepts a 1/4 inch screw, measures 0.5 inches in overall length, and has an outside diameter of 0.5 inches with an inside diameter of 0.257 inches. The zinc-plated brass construction resists corrosion and provides reliable electrical isolation in panel assemblies, control boards, and electronic enclosures. Licensed electricians, HVAC technicians, and electronics assembly professionals install this type of hardware during control board mounting and enclosure builds.

This spacer is suited for use in residential and commercial applications wherever circuit boards require controlled standoff spacing from a chassis or secondary board. Typical install scenarios include HVAC control panel assemblies, electrical enclosure builds, and industrial electronics mounting. The female unthreaded body allows a fastener to pass through or seat against the spacer without threading into it, making it a straightforward stack or standoff solution in tight board layouts.

Key Features

• Brass construction meets ASTM B633, QQ-B-626 Comp 22 Type 1 fastener standards
• Zinc-plated finish for added corrosion resistance in control panel environments
• Female unthreaded body accepts 1/4 inch screw hardware
• Round body shape with 0.5 inch outside diameter for consistent board spacing
• Inside diameter tolerance of 0.000 to 0.010 inches and length tolerance of -0.005 to 0.005 inches for precise fitment
• Sold individually, minimum order quantity of 1

Compatibility

Designed as an OEM-style replacement or new-install spacer for circuit board assemblies requiring a 1/4 inch screw size, 0.5 inch standoff length, and 0.5 inch outside diameter in inch-measurement systems.

Installation Notes

Installation is typically performed by licensed electricians or qualified electronics assembly technicians. De-energize all circuits and discharge any capacitors before handling control boards or installing hardware inside electrical enclosures. Use appropriately sized hand tools to seat fasteners without over-torquing, as brass hardware can be damaged by excessive force. Follow applicable NEC guidelines for enclosure and control board assembly work.