Electro Hardware S1343-M01-F21-K Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1343-M01-F21-K is a round, female unthreaded circuit board spacer machined from brass and finished with a zinc plating for corrosion resistance. It measures 0.25 inches in overall length with an outside diameter of 0.5 inches and an inside diameter of 0.257 inches, sized for a 1/4 inch screw. The zinc-plated brass construction meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards. Electricians, electronics technicians, and PCB assembly professionals install this spacer to maintain precise board standoff distances and provide electrical isolation between a circuit board and its mounting surface.

This spacer is suited for use in control boards, panel assemblies, and electronic enclosures found in residential and commercial HVAC systems, electrical panels, pool equipment controls, and general electronics fabrication. Its compact 1/4 inch length makes it appropriate for applications where minimal stack height is required and consistent board spacing is critical to preventing shorts and mechanical stress on solder joints.

Key Features

• Brass construction with zinc-plated finish meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards
• Female unthreaded body accepts 1/4 inch screws for straightforward board mounting
• Overall length of 0.25 inches with a tight length tolerance of -0.005 to 0.005 inches for consistent standoff height
• Inside diameter of 0.257 inches with an ID tolerance of 0.000 to 0.010 inches for reliable screw fit
• Round body shape with 0.5 inch outside diameter provides stable bearing surface on the board or chassis
• Zinc plating adds corrosion resistance for use in humid or condensate-prone enclosures

Compatibility

Designed as a standard inch-series round circuit board spacer for use with 1/4 inch fasteners in PCB mounting applications across HVAC controls, electrical enclosures, and electronic equipment assemblies.

Installation Notes

Installation is performed by electronics technicians or licensed electricians during control board assembly or replacement. De-energize and lock out all power to the equipment before handling circuit boards or installing spacers. Use appropriately sized hand tools to avoid over-torquing fasteners into the unthreaded female body, which can deform the spacer or damage the board. Follow applicable NEC guidelines when working inside electrical enclosures.