Electro Hardware S797-M01-F21-G Circuit Board Spacer Brass

Product Description

The ELECTRO HARDWARE S797-M01-F21-G 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 secondary board. The spacer has an overall length of 0.3125 inches, an outside diameter of 0.3125 inches, and an inside diameter of 0.141 inches, sized to accept a No. 6 screw. The zinc-plated brass construction meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, making it suitable for environments where corrosion resistance and dimensional consistency are required. Electronics technicians and panel assemblers are the typical installers.

This spacer is used in electronic assembly and circuit board mounting applications across commercial and industrial settings. Its female unthreaded bore accepts a No. 6 fastener, allowing it to serve as a pass-through standoff between stacked boards or between a board and an enclosure floor. The round body and consistent outside diameter allow for clean, uniform board layouts. It is commonly used in control panel builds, HVAC control board assemblies, electrical enclosures, and similar low-voltage electronics installations where precise board-to-surface clearance is critical.

Key Features

• Female unthreaded design accepts No. 6 screw for straightforward pass-through mounting
• Brass construction with zinc-plated finish per ASTM B633 and QQ-B-626 Comp 22 Type 1
• Overall length of 0.3125 inches with a tight length tolerance of -0.005 to 0.005 inches
• Inside diameter of 0.141 inches with a tolerance of 0.000 to 0.010 inches for consistent fitment
• Round body profile supports uniform board spacing and repeatable assembly
• Inch measurement system with fully specified decimal dimensions for precise sourcing

Compatibility

Designed as an OEM-style replacement or direct-use spacer for circuit board mounting assemblies requiring a No. 6 screw, round brass standoff with a 0.3125-inch outside diameter and 0.3125-inch overall length.

Installation Notes

Installation is performed by electronics technicians or panel assemblers during board mounting or enclosure assembly. Power down all circuits and discharge any stored energy before working inside control panels or enclosures. Use a No. 6 fastener with appropriate driver; do not overtighten through the unthreaded bore as this spacer is not internally threaded and relies on the mating fastener and hardware for clamping force. Follow applicable electrical codes and equipment manufacturer guidelines for board standoff clearance requirements.