Electro Hardware S1143-M01-F21-G Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1143-M01-F21-G is a round, female unthreaded circuit board spacer designed to create a fixed standoff distance between a PCB and a mounting surface. Manufactured from brass and finished with 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 boards, electrical enclosures, and similar panel applications. It measures 1.5 inches overall length with a 0.375-inch outside diameter and a 0.141-inch inside diameter, sized to accept a number 6 screw. The female unthreaded bore allows a screw to pass through cleanly without thread engagement at the spacer body itself.

This spacer is used in residential and commercial electronics assemblies where a rigid, dimensionally consistent standoff is required. Typical applications include mounting control boards, relay panels, and circuit assemblies inside HVAC units, electrical enclosures, and industrial control panels. The zinc-plated brass construction makes it appropriate for indoor environments where mild corrosion resistance is needed. Electricians, HVAC technicians, and electronics assembly professionals are the primary installers.

Key Features

• Brass body with zinc-plated finish per ASTM B633 and QQ-B-626 Comp 22 Type 1
• Female unthreaded bore accepts a number 6 screw without thread engagement at the spacer
• 1.5-inch overall length with tight length tolerance of -0.005 to 0.005 inches
• 0.375-inch outside diameter with 0.141-inch inside diameter and ID tolerance of 0.000 to 0.010 inches
• Round body profile for consistent seating on flat mounting surfaces
• Sold individually, compatible with single-piece repair or assembly builds

Compatibility

Designed as an OEM-style replacement or new-install standoff for circuit board assemblies requiring a number 6 screw, round female unthreaded brass spacer with a 1.5-inch overall length.

Installation Notes

Installation is performed by electricians or electronics technicians during control board assembly or replacement. De-energize all circuits and discharge any capacitors before handling PCB components. Position the spacer between the board and the mounting panel, then pass the appropriate number 6 fastener through the bore. Follow applicable NEC requirements for enclosure work when installing inside electrical panels or HVAC control compartments.