Electro Hardware S1359-M01-F21-I Circuit Board Spacer Brass

Product Description

The ELECTRO HARDWARE S1359-M01-F21-I is a round, female unthreaded circuit board spacer designed to maintain precise standoff distance between a PCB and a mounting surface or between stacked boards. Machined from brass to ASTM B633, QQ-B-626 Comp 22 Type 1 standards and finished with a zinc plating for corrosion resistance, this spacer accepts a No. 10 screw and measures 0.5 inches overall length with a 0.5-inch outside diameter and a 0.194-inch inside diameter. It is suited for electronics assembly, control board mounting, and similar precision fastening applications in trade equipment.

This spacer is used wherever a circuit board requires a fixed standoff from a chassis, enclosure panel, or secondary board. Typical applications include HVAC control board installations, electrical panel assemblies, and industrial equipment PCB mounting. The female unthreaded bore accepts a No. 10 screw passed through the board, allowing the spacer to act as a rigid standoff without requiring a tapped thread in the spacer body itself. It is installed by electronics assemblers, controls technicians, and electricians during equipment assembly or board replacement.

Key Features

• Brass construction meets ASTM B633, QQ-B-626 Comp 22 Type 1 standards
• Zinc-plated finish provides corrosion resistance in enclosure environments
• Female unthreaded bore sized for No. 10 screw fasteners
• 0.5-inch overall length with tight length tolerance of -0.005 to 0.005 inches
• 0.194-inch inside diameter with tolerance of 0.000 to 0.010 inches for consistent fit
• Round body profile for uniform standoff and easy alignment during assembly

Compatibility

Designed as an OEM-style round circuit board spacer for use with No. 10 screw fasteners in PCB standoff and mounting applications across control boards, enclosures, and electronic assemblies requiring a 0.5-inch standoff height.

Installation Notes

Installation is performed by electronics assemblers, controls technicians, or licensed electricians working on PCB mounting or control board replacement. Power down and de-energize all equipment before handling circuit boards or installing spacers. Use appropriately sized No. 10 screws and avoid over-torquing, which can crack solder joints or deform the spacer bore. Follow applicable NEC guidelines when working inside energized enclosures.