Electro Hardware S317M01F21C Round Pcb Spacer Brass

Product Description

The ELECTRO HARDWARE S317M01F21C is a round, female unthreaded circuit board spacer designed to maintain precise standoff clearance between a PCB and a mounting surface or adjacent board. Machined from brass and finished with a zinc plating per ASTM B633 and QQ-B-626 Comp 22 Type 1, this spacer delivers corrosion resistance suitable for electronics assemblies in HVAC control panels, electrical enclosures, and similar trade equipment. It accepts a No. 2 screw, measures 0.625 inches in overall length, and has an inside diameter of 0.089 inches with an outside diameter of 0.1875 inches. The female unthreaded design allows a fastener to pass through or seat against it during board mounting.

This spacer is used wherever a No. 2 fastener is needed to stack or isolate a circuit board from a chassis or mounting plate. Typical applications include control board installations in residential and light commercial HVAC units, electrical enclosures, and industrial panel assemblies. The brass construction with zinc finish makes it suitable for environments where mild corrosion resistance is required. Electricians, HVAC technicians, and electronics assembly professionals commonly use this type of hardware during control board replacement or panel fabrication work.

Key Features

• Female unthreaded body accepts No. 2 screws for straightforward board mounting
• Brass base material with zinc plating per ASTM B633 and QQ-B-626 Comp 22 Type 1
• Overall length of 0.625 inches with a tight length tolerance of -0.005 to 0.005 inches
• Inside diameter of 0.089 inches with a tolerance of 0.000 to 0.010 inches
• Round body profile with 0.1875 inches outside diameter for compact footprint on dense PCB layouts

Compatibility

Designed for use with No. 2 fasteners in standard circuit board standoff applications across HVAC control panels, electrical enclosures, and electronics assemblies requiring a round brass spacer at this size.

Installation Notes

Installation is performed by electricians or HVAC technicians during control board service or panel assembly. Always de-energize and lock out the equipment before working inside any electrical enclosure or control panel. Ensure the mating fastener is a No. 2 screw and that the board hole pattern aligns with the spacer inside diameter before seating. Avoid over-torquing fasteners against the unthreaded bore, as the spacer provides positional standoff only and is not intended to carry thread load.